Fig. 3

Displacement field between the averages for September 21–30, 2020, and March 21–30, 2021. The red and blue circles denote the GEONET and SoftBank sites, respectively. The vectors plotted in the figures are those relative to 950241 (Ogata in Niigata Prefecture, latitude 37.231°N, longitude 138.334°E). a Horizontal component, b vertical component. The error ellipsoid and bars indicate the one sigma confidential level