Earthquake Details: southern Gunma

8/14/2026, 9:58:00 PM

A magnitude 3.6 earthquake occurred near southern Gunma on 8/14/2026 at 9:58:00 PM. The seismic event was recorded at a depth of 700 km. No tsunami warning was issued.

No Tsunami WarningStatus: reviewedType: earthquake

Regional Seismicity

View recent seismic activity near this event:

Japan Gunma Ōwa (Nearest City)

Technical Details

Depth700 km

Significance0

Latitude36.2000

Longitude139.5000

Event IDjma:20260815065838

Magnitude3.6

Updated:8/14/2026, 10:01:00 PM

External Resources

View on JMA Official Site

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Time & depth

Local time: 8/15/2026, 6:58:00 AM GMT+9
UTC: 8/14/2026, 9:58:00 PM UTC

700 km · Deep-focus

More than 300 km deep. Deep earthquakes can be felt across a wide area.

Nearby major cities

Nearby event sequence · 12

M3.5off the coast of IwateBefore8/13/2026, 2:29:00 AM M2.8off the coast of IwateBefore8/13/2026, 6:01:00 PM M5.1eastern Honshu, JapanBefore8/13/2026, 7:21:36 PM M4.2eastern Mino, GifuBefore8/13/2026, 7:22:00 PM M3.4off the coast of Noto PeninsulaBefore8/13/2026, 8:31:00 PM M2.8northeastern ChibaBefore8/13/2026, 10:50:00 PM M2.8northern TochigiBefore8/14/2026, 8:29:00 AM M4.8207 km SE of Katsuura, JapanBefore8/14/2026, 9:58:43 AM M4.5off the coast of FukushimaAfter8/15/2026, 1:10:00 AM M3.0Osaka BayAfter8/15/2026, 12:03:00 PM M3.2northern IbarakiAfter8/15/2026, 5:59:00 PM M3.7off the coast of IwateAfter8/15/2026, 9:18:00 PM

Earthquake information is automatically aggregated from the official seismic agencies listed below. Preliminary measurements can change as agencies review an event; use local emergency authorities for safety decisions. Latest successful data update: Aug 14, 2026, 10:01 PM UTC. Data sources: USGS / EMSC / JMA / Geoscience Australia / GeoNet.