Table 3 Observed coseismic change (OCC) of groundwater level, groundwater response to the M2 tidal component, volumetric strain (CVS) calculated using the code of Okada (1992), and expected coseismic change (ECC) in groundwater level
From: Coseismic changes in groundwater level during the 2018 Hokkaido Eastern Iburi earthquake
Site | OCC (cm) | Response for M2 tide (mm/10−9 strain) | CVS (× 10−8 strain) | ECC (cm) |
|---|---|---|---|---|
ABT | n.d. | 0.08 ± 0.01 | 4.4 | − 0.4 |
JNS | − 3.5 | 0.50 ± 0.01 | 1.5 | − 0.8 |
KTB | − 3.0 | 0.30 ± 0.01 | 2.1 | − 0.6 |
TKC | n.d. | 0.52 ± 0.01 | 0.41 | − 0.2 |
TSK | n.d. | 0.42 ± 0.01 | 0.23 | − 0.1 |
YCG | − 3.3 | 2.67 ± 0.02 | 1.4 | − 3.8 |