Additional file 2 of In-situ calibration of Ishii-type multicomponent borehole strainmeters deployed in southwest Japan

Supplementary Material 2. Figures S2f–S2k: The four sets of theoretical and observed strains obtained using the 3-gauge groupings produced by the 2010 Chile (Maule) earthquake. Figures S3a–S3b: The four sets of theoretical and observed strains obtained using the 3-gauge groupings produced by the 2021 Kermadec Islands earthquake (Mw 8.1). Table S1: Extracted tidal responses for the M2 and O1 tidal components and the atmospheric responses from the 2 borehole strainmeter data. Phases are relative to the local tidal potential, and negative phase values indicate lag. These responses of the other 11 Ishii-type strainmeters are already provided in Table S3 of Kamigaichi et al. (2021). Table S2: Predicted tidal strains at the deployment depth at two observation stations estimated using the modified GOTIC2 program. Phases are relative to the local tidal potential, and negative phase values indicate lag. These tidal strains for the other 11 Ishii-type strainmeters are already provided in Table S2 of Kamigaichi et al. (2021). Table S3: Calibration matrices C, coupling matrices K, and D derived from Eq. (A3), Dmatrix calculated from Eq. (B7), and perturbation matrices P for the 13 borehole strainmeters.