Additional file 1 of Continuous monitoring of instrumental clock errors at 50 volcanoes in Japan based on seismic interferometry

Additional file 1: Table S1. Estimated clock errors for all stations. Fig. S1. (a) Topographic maps of Atosanupuri, Meakan, Taisetsuzan, Tokachi, Tarumae, Kuttara, Usu, Hokkaido-Komagatake, and Esan volcanoes. The red inverted triangles on the topographic maps represent seismic stations for which clock errors were detected. (b) Record sections of seismic ambient noise CCFs for those 9 volcanoes in the frequency band between 0.2 and 4 Hz. These CCFs were calculated by stacking daily CCFs during the study period. Note that the daily CCFs when clock errors occurred were discarded. Fig. S2. Similar to Fig. S1, but for Hakkoda, Towada, Iwakisan, Akitayakeyama, Mt. Iwate, Akitakomagatake, Chokaisan, Kurikomayama, and Zao volcanoes. Fig. S3. Similar to Fig. S1, but for Azuma, Adatara, Bandai, Nasu, Nikkoshirane, Kusatsu-Shirane, Asama, Mt. Fuji, and Hakone volcanoes. Fig. S4. Similar to Fig. S1, but for Izu-Tobu, Izu-Oshima, Niijima, Kozushima, Miyakejima, Hachijojima, Aogashima, and Ioto volcanoes. Fig. S5. Similar to Fig. S1, but for Niigatayakeyama, Midagahara, Yakedake, Norikuradake, Ontake, and Hakusan volcanoes. Fig. S6. Similar to Fig. S1, but for Tsurumidake, Kujyu, Aso, Unzen, Kirishima, Sakurajima, Satsumaiwo, Kuchinoerabu, and Suwanosejima volcanoes. Fig. S7. Temporal changes in SCCF (three-day-stacked CCF) waveforms for station pairs with clock errors (N.AMOV–V.ASMG, V.AMSO–V.ASMB, N.MKSV–V.MKJA, N.MKTV–V.MKJA, OK.KOM–OK.MHK, and V.MEAB–V.MEAA). Fig. S8. Similar to Fig. S7 but for N.GJKV–V.OSMA, N.ODKV–V.OSSN, N.OOHV–V.OSFT, N.OSMV–V.OSFT, V.KIRA–V.KIMH, and V2KTCM–V.KIKH. Fig. S9. Similar to Fig. S7 but for V.SKA2–V.SKRB, V.SKRC–V.SKRD, V.HKKF–V.HMA2, V.HKMA–V.HKTK, and N.ASIV–V2ASOE. Fig. S10. Temporal changes in clock errors (top) and those for differences in cAIC from two different models for line fitting (y=ax+b and y=ax) (bottom) for six stations.