Data publication for "Different earthquake nucleation conditions revealed by stress drop and b-value mapping in the northern Chilean subduction zone"

Abstract: b-value catalog data publication supplement for "Different earthquake nucleation conditions revealed by stress drop and b-value mapping in the northern Chilean subduction zone" (Folesky, (SciRep,2024), https://doi.org/10.1038/s41598-024-63015-w). b-vales were computed based on the IPOC seismic catalog for northern Chile (Sippl et al., 2023).  b-values are computed only for events that have a known stress drop value, as assigned by Folesky et al., 2024. b-values are computed for the 200-1000 nearest neighbors of each event within a maximum distance of 50km using the maximum likelihood approach as implemented by T.Goebel (Geobel et al., 2017). Each seismotectonic class (Sippl et al., 2023) is processed separately. The standard deviation of the fit is obtained by 100 bootstrap iterations for each event while discarding randomly selected 10% of the neighbors.

File descriptions: table columns ID, cls, Lon, Lat, Depth, Magntiude, a, b, Std------------------explanationID : origin timecls : event classLon : longitude Lat : latitudeDepth : depth in kmMagnitude : magnitude (MA)a : a- value  b : b- valueStd : standard deviation from bootstrapping

References:

Folesky, Jonas, (SciRep,2024), https://doi.org/10.1038/s41598-024-63015-w

Sippl, C., Schurr, B., Münchmeyer, J., Barrientos, S., Oncken, O. (2023): Catalogue of Earthquake Hypocenters for Northern Chile from 2007-2021 using IPOC (plus auxiliary) seismic stations. https://doi.org/10.5880/GFZ.4.1.2023.004

Folesky, J., Pennington, CN., Kummerow J., Hofman LR. (JGR: Solid Earth, 2024) https://doi.org/10.1029/2023JB027549

Goebel, T. H., Kwiatek, G., Becker, T. W., Brodsky, E. E. & Dresen, G. What allows seismic events to grow big?: Insights from b-value and fault roughness analysis in laboratory stick-slip experiments. Geology 45, 815–818 (2017).