異常震域ってやつだな
https://weather-pctr.c.yimg.jp/t/weather-img/earthquake/20220509173349/c2ac6be2_1652085480_point.png
https://tigakutasu.com/wp-content/uploads/2020/09/2FAB6172-6BF6-43E9-8468-1189194E7F92-1024x1024.png