Fig. 5
From: Crustal structure beneath earthquake swarm in the Noto peninsula, Japan
a Histograms of focal depth of (gray) JMA original and (red) relocated hypocenters (M ≥ 1) for the Noto earthquake swarm that occurred from January 2003 to March 2022 in an area shown in b. b The locations of relocated hypocenters (M ≥ 1) with colors representing elapsed days from December 1st, 2020, when swarm activity started to be active. Green lines denote the location of the major active faults and segments. Red circles represent the epicenters of three M ≥ 5 earthquakes. c Vertical cross section of relocated hypocenters along five profiles (K–O) shown in b. Colors represent elapsed days from December 1st, 2020. Other symbols are the same as in Fig. 3