GEM Global Flatfile

The GEM Global Flatfile Disclaimer The GEM Global Flatfile is provided for research and scientific purposes only. The Global Earthquake Model (GEM) Foundation and its contributors accept no liability for any direct, indirect, incidental, or consequential loss or damage arising from the use of, or reliance on, this dataset or any information derived from it. This flatfile is a homogenised compilation of multiple independent ground-motion datasets. The homogenisation process (described herein) may result in parameter values for individual records that differ from those reported in the original datasets. Users are strongly advised to consult the original authors and publications of each constituent dataset (referenced herein) and to verify any record-level information critical to their analysis against the originating database. GEM does not guarantee the accuracy, completeness, or fitness for purpose of any information contained within this flatfile. Use of this dataset is at the user’s own risk. The Global Earthquake Model (GEM) Foundation’s Global Flatfile is a homogenized collection of publicly available ground-motion datasets. This dataset is maintained with the purpose of facilitating ground-motion modelling/characterization activities. The flatfile is formatted to work readily with the residual analysis capabilities of the Strong-Motion Tools (SMT) module of the OpenQuake Model Builder’s Toolkit (OQ-MBTK - https://github.com/GEMScienceTools/oq-mbtk). To be clear, this is a ground-motion flatfile - it contains the earthquake source, seismic station and travel path parameters of each record, alongside the response spectra and other ground-motion intensity measures obtained from processing of each record (i.e., the metadata). It does not contain the associated waveforms. A unique identifier is provided for each record (if available in the original dataset) to permit the retrieval of the associated waveforms (again if available) and any other information not included in the GEM Global Flatfile. Event information is homogenized across the flatfiles and is updated where possible (and appropriate) from the GEM Global Earthquake Catalogue (e.g., to obtain nodal plane solutions if not provided in the original dataset). If an event’s information is updated, then the distances to the stations (epicentral distance, rupture distance, Joyner-Boore distance, Rx, Ry0) recording it are recomputed by reconstructing the rupture within the OpenQuake Engine (https://github.com/gem/oq-engine). Checks are also in place to remove duplicate records across the different datasets following the homogenisation of the event and station information. However, the user should still be mindful of carefully examining the metadata themselves - for example, although we homogenise stations over flatfiles, a given station might have significantly different metadata amongst datasets if a station was relocated. The column headers within the GEM Global flatfile closely (but not identically) follow those within the ESM flatfile format. Some additional headers are provided which track homogenisation information (e.g. if an event or station exists in multiple datasets, which dataset’s information was used in the homogenisation process). A description of each column header in the GEM Global Flatfile is provided below. If a flatfile only provides the geometric mean of the two horizontal components, we use the Boore and Kishida (2017) relationships to convert to rotD50 for PGA and spectral accelerations (this is flagged within the “provided_IMCs” column). Full accreditation to the original datasets is ensured through providing for each record: A DOI if a reference is available for the dataset A license (e.g. CC BY-NC 4.0), and if not explicitly stated we explain the terms of use we have inferred for the dataset A download link where the original dataset can be obtained We always intend to respect the licensing and terms of use of any dataset we have integrated. If you are an author of an included dataset and believe the terms of use or licensing have not been upheld, please contact us to help rectify such an issue. A list of the flatfiles currently integrated into the GEM Global Flatfile is provided below. We also provide each incorporated flatfile in GEM flatfile format. The user can then readily use any of the individual datasets within the SMT (prior to the homogenisation process potentially modifying the original information within them). Included Datasets NGAWest3 Flatfile IDENTIFIER IN FLATFILE (orig_db column): NGAwest3 REFERENCE: Natural Hazards Risk and Resiliency Research Center (NHR3) (2025) Data resources for NGA-West3 project, Report GIRS-2025-07, TE Buckreis and JP Stewart (Editors), Y Bozorgnia (NGA-West3 Project PI), B. John Garrick Risk Institute, Natural Hazards Risk and Resiliency Research Center, UCLA (Center Headquarters). DOI: https://doi.org/10.34948/N3D30R LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (assume Open Data Commons Attribution license given dataset is publicly accessible). COMPONENTS: Both horizontal components, RotD50, RotD100, RotD00. Vertical provided. DOWNLOAD LINK: https://www.risksciences.ucla.edu/girs-reports/2025/07 NGASUB Flatfile IDENTIFIER IN FLATFILE (orig_db column): NGAsub REFERENCE: Silvia Mazzoni, Tadahiro Kishida, Victor Contreras, Sean K. Ahdi, Dong Youp Kwak, Yousef Bozorgnia, and Jonathan P. Stewart (2021): NGA-Sub Flatfile: R211022. The B. John Garrick Institute for the Risk Sciences. Dataset. doi: https://doi.org/10.34948/N3Z59T DOI: https://doi.org/10.34948/N3Z59T LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (assume Open Data Commons Attribution license given dataset is publicly accessible). COMPONENTS: RotD50. No vertical. DOWNLOAD LINK: https://www.risksciences.ucla.edu/nga-sub-flatfile-r211022 NGAEast Flatfile (2023 version) IDENTIFIER IN FLATFILE (orig_db column): NGAeast REFERENCE: Ramos-Sepulveda, M., T. Buckreis, M. Li, G. Parker, S. Brandenberg, E. Rathje, J. Stewart (2023). 2023 NGA-Compatible CENA Database for GMM Validation and Site Response Studies. DesignSafe-CI. doi: https://doi.org/10.17603/ds2-ywqs-sp29 DOI: https://doi.org/10.17603/ds2-ywqs-sp29 LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (stated Open Data Commons Attribution license on designsafe-ci.org). COMPONENTS: Both horizontal components (SAs only) and RotD50, RotD100, RotD00 provided (peak measures + SAs). Vertical provided. DOWNLOAD LINK: https://www.designsafe-ci.org/data/browser/public/designsafe.storage.published/PRJ-4084 ESM Flatfile (URL Searchable Version) IDENTIFIER IN FLATFILE (orig_db column): ESM REFERENCE: Lanzano G, Sgobba S, Luzi L et al. The pan-European Engineering Strong Motion (ESM) flatfile: compilation criteria and data statistics. Bull Earthquake Eng 17, 561-582 (2019). doi: https://doi.org/10.1007/s10518-018-0480-z DOI: https://doi.org/10.1007/s10518-018-0480-z LICENSE: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) (stated in Lanzano et al. (2018) ESM journal paper). COMPONENTS: Both horizontal components, RotD50, RotD100, RotD00. Vertical provided. DOWNLOAD LINK: https://esm-db.eu/esmws/flatfile/1/ NZL 2023 GMDB (v3.4 - accessed 22/03/2024) IDENTIFIER IN FLATFILE (orig_db column): nzl_2023 REFERENCE: Jesse A Hutchinson, Chuanbin Zhu, Brendon A Bradley, Robin L Lee, Liam M Wotherspoon, Michael Dupuis, Claudio Schill, Jason Motha, Elena F Manea, Anna E Kaiser; The 2023 New Zealand Ground-Motion Database. Bulletin of the Seismological Society of America 2024; 114 (1): 291-310. doi: https://doi.org/10.1785/0120230184 DOI: https://doi.org/10.1785/0120230184 LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (assume Open Data Commons Attribution license given dataset distributed by GNS through journal paper). COMPONENTS: RotD50, RotD100 and vertical. DOWNLOAD LINK: https://osf.io/q9yrg/?view_only=05337ba1ebc744fc96b9924de633ca0e IMPORTANT: The backarc parameter has been assigned to each station using the backarc.json provided in the files from GNS when requesting the 2022 NSHM for New Zealand. Australia 2025 GMDB IDENTIFIER IN FLATFILE (orig_db column): australia_2025 REFERENCE: Hadi Ghasemi, Trevor Allen, Abhi Sunketa, Callum Mckenna, Deepika Mani; AGMD: A Ground-Motion Database for the Australian Continental Crust. Seismological Research Letters 2026; doi: https://doi.org/10.1785/0220250316 DOI: https://doi.org/10.1785/0220250316 LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (stated Open Data Commons Attribution license at https://www.ga.gov.au/copyright). COMPONENTS: RotD50 and vertical. DOWNLOAD LINK: https://agmd.ga.gov.au/ Turkiye 2023 SMD IDENTIFIER IN FLATFILE (orig_db column): turkiye_2023 REFERENCE: Sandıkkaya MA, Güryuva B, Kale Ö, et al. An updated strong-motion database of Türkiye (SMD-TR). Earthquake Spectra. 2023;0(0). doi: https://doi.org/10.17603/ds2-f21x-s189 DOI: https://doi.org/10.17603/ds2-f21x-s189 LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (stated Open Data Commons Attribution license on designsafe-ci.org). COMPONENTS: Both horizontal components, RotD50 and RotD100. Vertical provided. DOWNLOAD LINK: https://www.designsafe-ci.org/data/browser/public/designsafe.storage.published/PRJ-3950v3 Hellenic 2021 Flatfile IDENTIFIER IN FLATFILE (orig_db column): hellenic_2021 REFERENCE: Margaris, B., E. M. Scordilis, J. P. Stewart, D. M. Boore, N. Theodoulidis, I. Kalogeras, N. S. Melis, A. A. Skarlatoudis, N. Klimis, and E. Seyhan (2021). Hellenic Strong-Motion Database with Uniformly Assigned Source and Site Metadata for the Period 1972-2015, Seismol. Res. Lett. 92, 2065-2080, doi: 10.1785/0220190337. DOI: https://doi.org/10.1785/0220190337 LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (confirmed by Nikos Theodoulidis). COMPONENTS: RotD50. No vertical. DOWNLOAD LINK: https://pubs.geoscienceworld.org/ssa/srl/article-abstract/92/3/2065/595659/Hellenic-Strong-Motion-Database-with-Uniformly Iran 2024 Flatfile IDENTIFIER IN FLATFILE (orig_db column): iran_2024 REFERENCE: Shokouhirad, S., Ansari, A. & Ghafory-Ashtiany, M. The recently compiled strong motion databank of Iran. Bull Earthquake Eng 23, 1-24 (2025). doi: https://doi.org/10.1007/s10518-024-02052-2 DOI: https://doi.org/10.1007/s10518-024-02052-2 LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (Creative Commons Attribution 4.0 license confirmed by Anooshiravan Ansari whom provided the flatfile to GEM). COMPONENTS: For peak measures, both horizontal components and vertical but no RotD50. For SA both horizontal components, RotD50 and vertical. DOWNLOAD LINK: This dataset was kindly provided to GEM by Anooshiravan Ansari. The dataset may be distributed within the GEM Global Flatfile. Use of this data requires full accreditation to the accompanying journal article stated above. India Ground Motion (IGM) 2025 Flatfile IDENTIFIER IN FLATFILE (orig_db column): igm_2025 REFERENCE: Sharma, S., Mannu, U., & Bora, S. S. (2025). A Flat-File Compilation of Strong Ground-Motion Intensity Measures for Crustal Earthquakes in the Indian Region. Seismica, 4(2). doi: https://doi.org/10.26443/seismica.v4i2.1620 DOI: https://doi.org/10.26443/seismica.v4i2.1620 LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (stated Open Data Commons Attribution license on figshare.com). COMPONENTS: For peak measures, geometric mean and vertical. For SA, RotD50, RotD100, RotD00 and vertical provided. We approximate rotD50 for PGA using the geometric mean and Boore and Kishida 2017 and omit the geometric mean values. DOWNLOAD LINK: https://figshare.com/articles/dataset/Indian_Ground_Motion_IGM_Database_A_Flat_File_Compilation_of_Strong_Ground-Motion_Intensity_Measures/29530823 (accessed 13/08/2025 but dataset appears to have since been removed from figshare) NIED 2024 Flatfile (v2024 - accessed 28/08/2024) IDENTIFIER IN FLATFILE (orig_db column): nied_2024 REFERENCE: Morikawa, N., A. Iwaki, H. Fujiwara, S. Akiyama, T. Maeda, H. Kubo, S. Aoi, T. Hayakawa, M. Takahashi, K. Kato, Y. Tomozawa, F. Suzuki, K. Motoki, T. Iida, T. Sato, T. Ishii, J. Miyakoshi, N. Shimazu, A. Oana, T. Hayashi, N. Kishida, T. Okazaki, H. Si, H. Matsuyama and S. Midorikawa (2024): Flat file of K-NET and KiK-net strong-motion records, Proceedings in the 18th World Conference on Earthquake Engineering. DOI: https://doi.org/10.17598/NIED.0032 LICENSE: The full license can be downloaded from: https://www.j-shis.bosai.go.jp/labs/ground-motion-flatfile/doc/gmf_yakkan_en.pdf. COMPONENTS: RotD50, RotD100 and RotD00. No vertical. DOWNLOAD LINK: https://www.j-shis.bosai.go.jp/en/labs/ground-motion-flatfile/ Puerto Rico and U.S. Virgin Islands Ground-Motion Database IDENTIFIER IN FLATFILE (orig_db column): prvi_2025 REFERENCE: Aagaard, B. T., Stephenson, W. J., Ahdi, S. K., and Herrick J. A. (2025). Ground-motion records and site information for Puerto Rico and the U.S. Virgin Islands, 2006-2024. Center for Engineering Strong Motion Data (CESMD), doi: 10.5066/P14E4GXW. DOI: https://doi.org/10.5066/P14E4GXW LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (assume Open Data Commons Attribution license given dataset is publicly accessible). COMPONENTS: RotD50. No vertical. DOWNLOAD LINK: https://www.strongmotioncenter.org/specialstudies/PRVI/ Colombia Geological Survey (SGC) Flatfile IDENTIFIER IN FLATFILE (orig_db column): SGC REFERENCE: Provided by SGC (from Julián Santiago Montejo) but permitted for public dissemination - any publications using this data must acknowledge SGC’s contribution of the dataset. The raw data can be downloaded from https://bdrsnc.sgc.gov.co/paginas1/catalogo/index_rnac.php and is provided by stations operated by the Red Sismológica Nacional de Colombia’s (CM) seismic network (https://www.fdsn.org/networks/detail/CM/). Additional predominant-period based Vs30s for the stations were provided by Cesar A. Pajaro Miranda. Some potential references which also provide more information on this dataset include: Arteta, C. A., Pajaro, C. A., Mercado, V., Montejo, J., Arcila, M., & Abrahamson, N. A. (2023). Ground-motion model (GMM) for crustal earthquakes in northern South America (NoSAm Crustal GMM). Bulletin of the Seismological Society of America, 113(1), 186-203. https://doi.org/10.1785/0120220168 Arteta, C. A., Pajaro, C. A., Mercado, V., Montejo, J., Arcila, M., & Abrahamson, N. A. (2021). Ground-motion model for subduction earthquakes in northern South America. Earthquake Spectra, 37(4), 2419-2452. https://doi.org/10.1177/87552930211027585 DOI: Some articles describing this dataset include (but are not limited to) https://doi.org/10.1177/87552930211027585 and https://doi.org/10.1785/0120220168 LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original datasets (Julián Santiago Montejo and Cesar A. Pajaro Miranda whom provided the datasets to GEM confirm an Open Data Commons Attribution license is appropriate). COMPONENTS: For SA, geometric mean, RotD50 and RotD100. No vertical. We approximate rotD50 for PGA using the geometric mean and Boore and Kishida 2017 and omit the geometric mean values. DOWNLOAD LINK: https://bdrsnc.sgc.gov.co/paginas1/catalogo/index_rnac.php Chile 2025 Flatfile IDENTIFIER IN FLATFILE (orig_db column): chile_2025 REFERENCE: Bastías, N., Montalva, G., Leyton, F., Heresi, P., & Domínguez, H. (2026). An Extended and Updated Strong Ground-Motion Database for the Chilean Subduction Earthquakes. Earthquake Spectra, 42(1), e70032. https://doi.org/10.1002/esp4.70032 DOI: https://doi.org/10.1002/esp4.70032 LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (stated Open Data Commons Attribution license on designsafe-ci.org). COMPONENTS: Both horizontal components and RotD50, RotD100, RotD00 (rotational measures only for SA). Vertical provided. Missing RotD50 values approximated using Boore and Kishida 2017. DOWNLOAD LINK: https://www.designsafe-ci.org/data/browser/public/designsafe.storage.published/PRJ-5828 Costa Rica 2025 Flatfile IDENTIFIER IN FLATFILE (orig_db column): crsmd_2025 REFERENCE: 2025 update to the dataset originally described in: Aarón Moya-Fernández, Luis A Pinzón, Victor Schmidt-Díaz, Diego Antonio Hidalgo-Leiva, Luis G Pujades; A Strong-Motion Database of Costa Rica: 20 Yr of Digital Records. Seismological Research Letters 2020; 91 (6): 3407-3416. doi: https://doi.org/10.1785/0220200036 DOI: https://doi.org/10.1785/0220200036 LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (confirmed by Diego Hidalgo). COMPONENTS: Both horizontal components, RotD50, RotD100, RotD00 (RotD50 only for SA). Vertical PGA, PGV, CAV, and Arias intensity provided. No vertical SA. DOWNLOAD LINK: https://crsmd.lis.ucr.ac.cr/ CISMID Ground-Motion Database IDENTIFIER IN FLATFILE (orig_db column): cismid_peru DESCRIPTION: Flatfile for Peru created internally by GEM for SAM25 Mosaic model GMC work from processing of records from Centro de Observación para la Ingeniería Sísmica (CISMID). Many of the event and station parameters have been estimated by GEM e.g. event Mw if a record’s event information only provides event ML or mb, and Vs30 for each station from the USGS Vs30 Mosaic (https://earthquake.usgs.gov/data/vs30/). The CISMID database was last accessed in April 2025. DOI: No DOI for this dataset (processed into flatfile by GEM) - records available from https://www.cismid.uni.edu.pe/ceois/red/redacis.php LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (assume Open Data Commons Attribution license given dataset is publicly accessible). COMPONENTS: Both horizontal components and RotD50. No vertical. All intensity measures computed by GEM. DOWNLOAD LINK: The records for each event in the CISMID database can be manually downloaded from: https://www.cismid.uni.edu.pe/ceois/redacis/red/ Groningen 2022 Flatfile IDENTIFIER IN FLATFILE (orig_db column): groningen_2022_induced REFERENCE: Ntinalexis M, Kruiver PP, Bommer JJ, et al. A database of ground motion recordings, site profiles, and amplification factors from the Groningen gas field in the Netherlands. Earthquake Spectra. 2022;39(1):687-701. doi: https://doi.org/10.1177/87552930221140926 DOI: https://doi.org/10.1177/87552930221140926 LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (Creative Commons Attribution 4.0 license - in License.txt file provided on database download page). COMPONENTS: We approximate RotD50 values using Boore and Kishida 2017 and omit the provided geometric mean values. No vertical. DOWNLOAD LINK: https://public.yoda.uu.nl/geo/UU01/KC2ZHQ.html Belshake 2025 Flatfile IDENTIFIER IN FLATFILE (orig_db column): belshake_2025 REFERENCE: Vanneste, K., & Onvani, M. (2025). Belgian ground-motion database (BELSHAKE) flatfile (2025-04) [Data set]. Royal Observatory of Belgium. doi: https://doi.org/10.5281/zenodo.15241694 DOI: https://doi.org/10.5281/zenodo.15241694 LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (stated Open Data Commons Attribution license on zenodo). COMPONENTS: For peak/scalar measures, both horizontals, RotD50, RotD100 and vertical. For SA, RotD50, RotD100 and vertical. DOWNLOAD LINK: https://zenodo.org/records/15241694 Oklahoma and Kansas 2017 Flatfile IDENTIFIER IN FLATFILE (orig_db column): ok_ks_2017_induced REFERENCE: Rennolet SB, Moschetti MP, Thompson EM, Yeck WL. A Flatfile of Ground Motion Intensity Measurements from Induced Earthquakes in Oklahoma and Kansas. Earthquake Spectra. 2018;34(1):1-20. doi: https://doi.org/10.1193/101916EQS175DP DOI: https://doi.org/10.1193/101916EQS175DP LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (assume Open Data Commons Attribution license given dataset distributed on USGS website). COMPONENTS: RotD50 and RotD100. No vertical. DOWNLOAD LINK: https://www.sciencebase.gov/catalog/item/57f7d8f2e4b0bc0bec09d04d Eastern Canada 2022 Flatfile IDENTIFIER IN FLATFILE (orig_db column): east_can_2022_db REFERENCE: Palmer, S (2022). Eastern Canada Earthquake Ground Motion and Site Characterization Database. DesignSafe-CI. doi: https://doi.org/10.17603/ds2-3b7s-yw72 DOI: https://doi.org/10.17603/ds2-3b7s-yw72 LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (stated Open Data Commons Attribution license on designsafe-ci.org). COMPONENTS: RotD50, RotD100 and RotD00. No vertical. DOWNLOAD LINK: https://www.designsafe-ci.org/data/browser/public/designsafe.storage.published/PRJ-3449 IMPORTANT: This dataset provides spectral acceleration intensity values for a given frequency. Given we invert to obtain the corresponding periods, we interpolate between the obtained periods (if reasonable) to provide SA(T) values for some of the columns in the GEM Global Flatfile. The user is advised to compare against the original dataset to understand which SA(T) values have been obtained through interpolation. UK 2019 Flatfile IDENTIFIER IN FLATFILE (orig_db column): uk_2019 REFERENCE: Manuela Villani, Barbara Polidoro, Rory McCully, Thomas Ader, Ben Edwards, Andreas Rietbrock, Ziggy Lubkowski, Tim J. Courtney, Martin Walsh; A Selection of GMPEs for the United Kingdom Based on Instrumental and Macroseismic Datasets. Bulletin of the Seismological Society of America 2019; 109 (4): 1378-1400. doi: https://doi.org/10.1785/0120180268 DOI: https://doi.org/10.1785/0120180268 LICENSE: Unrestricted non-commerical use with acknowledgement/citation of original dataset + acknowledgement of BGS making original strong-motion data available to the authors. COMPONENTS: RotD50. DOWNLOAD LINK: https://pubs.geoscienceworld.org/ssa/bssa/article/109/4/1378/572056/A-Selection-of-GMPEs-for-the-United-Kingdom-Based SEARS 2023 Flatfile IDENTIFIER IN FLATFILE (orig_db column): southears_2023 REFERENCE: Holmgren JM, Werner MJ, Goda K, et al. A relocated earthquake catalog and ground motion database for the southern East African rift system. Earthquake Spectra. 2023;39(3):1911-1929. doi: https://doi.org/10.1177/87552930231173450 DOI: https://doi.org/10.1177/87552930231173450 LICENSE: Unrestricted non-commercial use with acknowledgement/citation of original dataset (stated Creative Commons Attribution 4.0 license). COMPONENTS: Both horizontal components and RotD50 provided. No vertical. Note that for this dataset we interpolate to obtain SA for periods considered within the GEM global flatfile. DOWNLOAD LINK: http://www.isc.ac.uk/dataset_repository/view_submission.php?dsid=47 IMPORTANT: This dataset provides spectral acceleration intensity values for a given frequency. Given we invert to obtain the corresponding periods, we interpolate between the obtained periods (if reasonable) to provide SA(T) values for some of the columns in the GEM Global Flatfile. The user is advised to compare against the original dataset to understand which SA(T) values have been obtained through interpolation. Flatfile Column Descriptions Column Description event_id Unique event identifier event_time Date and time of event ISC_ev_id International Seismological Centre event ID ev_latitude Event epicenter latitude ev_longitude Event epicenter longitude ev_depth_km Event depth (km) fm_type_code Fault mechanism type code (SS = strike-slip, R = reverse, N = normal, U = unknown) ML Local magnitude Mw Moment magnitude Ms Surface wave magnitude Md Duration magnitude mb Body wave magnitude es_strike Fault strike angle (preferred nodal plane solution) es_dip Fault dip angle (preferred nodal plane solution) es_rake Fault rake angle (preferred nodal plane solution) es_z_top Depth to top of rupture es_length Fault rupture length es_width Fault rupture width network_code Seismic network code station_code Seismic station code st_latitude Station latitude st_longitude Station longitude st_elevation Station elevation st_backarc Volcanic backarc flag (1 = in backarc, 0 = not in backarc) vs30_m_sec Shear-wave velocity in top 30m (m/s) vs30_meas_type Type of Vs30 measurement z1pt0 (m) Depth to Vs=1.0 km/s horizon (m) z2pt5 (km) Depth to Vs=2.5 km/s horizon (km) epi_dist Epicentral distance JB_dist Joyner-Boore distance rup_dist Rupture distance Rx_dist Site-to-rupture Rx distance Ry0_dist Site-to-rupture Ry0 distance U_hp High-pass filtered U component V_hp High-pass filtered V component W_hp High-pass filtered W component U_lp Low-pass filtered U component V_lp Low-pass filtered V component W_lp Low-pass filtered W component provided_IMCs Provided intensity measure components in original flatfile shortest_usable_period Shortest usable spectral period longest_usable_period Longest usable spectral period orig_db Original database name orig_db_license Original database license orig_db_doi Original database DOI orig_db_download_link Link or description for downloading the original dataset orig_db_rec_identifier Original database record identifier ev_info_updated_from_gem_gcat_flag Event info updated from GEM GCAT flag ev_info_homog_flag Event info homogenized flag st_info_homog_flag Station info homogenized flag distances_recomputed_flag Distances recomputed flag event_trt_from_db Event tectonic region type from database event_trt_from_classifier Event tectonic region type from OQ-MBTK classifier event_id_original Original event ID station_code_original Original station code U_pga Peak ground acceleration U component (cm/s²) V_pga Peak ground acceleration V component (cm/s²) W_pga Peak ground acceleration W component (cm/s²) rotD50_pga Rotated median PGA (cm/s²) rotD100_pga Rotated maximum PGA (cm/s²) rotD00_pga Rotated minimum PGA (cm/s²) U_pgv Peak ground velocity U component (cm/s) V_pgv Peak ground velocity V component (cm/s) W_pgv Peak ground velocity W component (cm/s) rotD50_pgv Rotated median PGV (cm/s) rotD100_pgv Rotated maximum PGV (cm/s) rotD00_pgv Rotated minimum PGV (cm/s) U_pgd Peak ground displacement U component (cm) V_pgd Peak ground displacement V component (cm) W_pgd Peak ground displacement W component (cm) rotD50_pgd Rotated median PGD (cm) rotD100_pgd Rotated maximum PGD (cm) rotD00_pgd Rotated minimum PGD (cm) U_CAV Cumulative absolute velocity U component (cm/s) V_CAV Cumulative absolute velocity V component (cm/s) W_CAV Cumulative absolute velocity W component (cm/s) rotD50_CAV Rotated median CAV (cm/s) rotD100_CAV Rotated maximum CAV (cm/s) rotD00_CAV Rotated minimum CAV (cm/s) U_ia Arias intensity U component (m/s) V_ia Arias intensity V component (m/s) W_ia Arias intensity W component (m/s) rotD50_ia Rotated median Arias intensity (m/s) rotD100_ia Rotated maximum Arias intensity (m/s) rotD00_ia Rotated minimum Arias intensity (m/s) U_T0_010 ... U_T10_000 Spectral acceleration U component at various periods (cm/s²) V_T0_010 ... V_T10_000 Spectral acceleration V component at various periods (cm/s²) W_T0_010 ... W_T10_000 Spectral acceleration W component at various periods (cm/s²) rotD50_T0_010 ... rotD50_T10_000 Rotated median spectral acceleration at various periods (cm/s²) rotD00_T0_010 ... rotD00_T10_000 Rotated minimum spectral acceleration at various periods (cm/s²) rotD100_T0_010 ... rotD100_T10_000 Rotated maximum spectral acceleration at various periods (cm/s²)