RSS feed source: USGS Earthquake Hazards Program

Sunday, Dec 21, 2025 07:13 | 1 hour ago | By: EarthquakeMonitor

An earthquake of magnitude 5.1 occurred early afternoon on Sunday, December 21st, 2025, at 3:58 pm local time near Isumi, Isumi Shi, Chiba, Japan, as reported by the European-Mediterranean Seismological Centre (EMSC).
According to preliminary data, the quake was located at a moderately shallow depth of 56. km. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
A second report was later issued by the citizen-seismograph network of RaspberryShake, which listed it as a magnitude 5.1 earthquake as well. Other agencies reporting the same quake include the German Research Centre for Geosciences (GFZ) at magnitude 5.1, France’s Réseau National de Surveillance Sismique (RéNaSS) at magnitude 5.2, and Japan’s National Research Institute for Earth Science and Disaster Resilience (NIED) at magnitude 4.9.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Isumi (pop. 35,500) located 117 km from the epicenter, and Choshi (pop. 58,400) 124 km away.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up

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RSS feed source: USGS Earthquake Hazards Program

Date and TimeMag
DepthDistanceLocationDetailsMap Dec 21, 02:41 pm (GMT +9)

4.7

180 km59 km (36 mi) to the SW Banda Sea, 41 km southeast of Pulau Damar Island, Maluku, Indonesia  I FELT IT InfoDec 20, 03:49 am (GMT +9)

3.6

182 km62 km (38 mi) to the W Banda Sea, 21 km northeast of Pulau Damar Island, Maluku, Indonesia  I FELT IT

Info

Dec 18, 12:46 pm (GMT +9)

3.9

121 km6.5 km (4 mi) to the NW Banda Sea, 69 km northwest of Pulau Dai Island, Maluku, Indonesia  I FELT IT

Info

Dec 18, 04:44 am (GMT +9)

4.0

164 km72 km (45 mi) to the NE Banda Sea, 95 km north of Pulau Dai Island, Maluku, Indonesia  I FELT IT InfoDec 17, 07:48 pm (GMT +9)

3.9

139 km102 km (64 mi) to the NE Banda Sea, 115 km north of Pulau Dai Island, Maluku, Indonesia  I FELT IT

Info

Oct 28, 11:40 pm (GMT +9)

6.4

168 km91 km (57 mi) to the E Banda Sea 195 reportsInfoNov 8, 2023 01:53 pm (GMT +9)

7.1

6 km87 km (54 mi) to the N Banda Sea, 166 km north of Pulau Wetan Island, Maluku, Indonesia InfoNov 8, 2023 01:52 pm (GMT +9)

6.7

10 km95 km (59 mi) to the NE Banda Sea, 164 km north of Pulau Wetan Island, Maluku, Indonesia 7 reportsInfoSep 22, 2023 11:59 pm (Jayapura)

6.6

214 km64 km (40 mi) to the E Indonesia: Di Laut 184 Km Barat Laut Tanimbar 215 reportsInfoMay 25, 2023 12:49 am (Jayapura)

6.2

158 km35 km (22 mi) to the NE Banda Sea, 106 km north of Pulau Wetan Island, Maluku, Indonesia 739

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