Overview

• At 5:34 a.m. local time on Sept. 21, Suwanosejima recorded intensity 3 shaking from a magnitude 3.8 earthquake at a depth of about 10 km.
• There was no tsunami risk reported from the Sept. 21 event.
• Light shaking at intensity 1 was observed on Nakano-shima and Akusekijima during the Sept. 21 quake.
• A day earlier, at 1:02 p.m. on Sept. 20, a very shallow magnitude 3.0 quake also produced intensity 3 shaking on Suwanosejima.
• Seismic activity has continued since an intensity-5-minus quake on Sept. 17, and the Japan Meteorological Agency advises caution for roughly a week.