10:45 AM - 12:15 PM
[SCG58-P07] Non-volcanic swarms in Noto and Wakayama and their deep crustal structure
An earthquake swarm occurs in a confined area and consists of a number of successive similar-magnitude earthquakes, with no observations of clear mainshock. Swarm activity usually starts with no distinct seismic signals, lasts from months to years, and is often observed in volcanic and geothermal fields and near the vicinity of anthropogenic fluid injection wells. However, there are earthquake swarms, or concentrated seismicity, in non-volcanic areas in Japan. This study reports deep crustal stricture beneath the Noto-Hanto and Wakayama earthquake swarms and discuss the origin of these swarms in terms of upward fluid migration from the deep.