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Minor mag. 2.9 earthquake - 24 km south of Tomioka, Gunma, Japan, on Wednesday, Jan 25, 2023 at 4:31 am (GMT +9) -

Minor magnitude 2.9 earthquake at 144 km depth

24 Jan 19:38 UTC: First to report: NIED after 7 minutes.

Earthquake details

Date & time	Jan 24, 2023 19:31:32 UTC -
Local time at epicenter	Wednesday, Jan 25, 2023 at 4:31 am (GMT +9)
Status	Confirmed
Magnitude	2.9
Depth	143.9 km
Epicenter latitude / longitude	36.055°N / 138.8°E (Tano-gun, Gunma, Japan)
Antipode	36.055°S / 41.2°W
Shaking intensity	Not felt
Felt
Primary data source	NIED (National Research Institute for Earth Science and Disaster Resilience)
Nearest volcano	Kita Yatsugatake (45 km / 28 mi)
Nearby towns and cities	24 km (15 mi) SSW of Tomioka (pop: 49,300) \| Show on map \| Quakes nearby 32 km (20 mi) SSW of Annaka (pop: 48,200) \| Show on map \| Quakes nearby 32 km (20 mi) SW of Fujioka (pop: 63,400) \| Show on map \| Quakes nearby 37 km (23 mi) SSW of Takasaki (pop: 240,900) \| Show on map \| Quakes nearby 46 km (29 mi) SSW of Maebashi (pop: 282,700) \| Show on map \| Quakes nearby 46 km (29 mi) SW of Isesaki (pop: 130,700) \| Show on map \| Quakes nearby 77 km (48 mi) WNW of Yono (Saitama) (pop: 1,077,700) \| Show on map \| Quakes nearby 90 km (56 mi) WNW of Tokyo (pop: 8,336,600) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Few Clouds -8.9°C (16 F), humidity: 54%, wind: 4 m/s (9 kts) from WNW
Estimated seismic energy released	1.4 x 10⁹ joules (392 kilowatt hours, equivalent to 0.338 tons of TNT) \| about seismic energy

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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.

Mag.	Depth	Location	Source
2.9	144 km	Japan: SE GUNMA PREF	NIED

Most recent quakes Top 20 past 24 hrs Quakes in Japan

Seismograms

Seismic station: Matsushiro, Japan (MAJO/IU network) | Distance from quake: 76 km / 47 mi | Show on map | Station Info

Seismic station Matsushiro, Japan: vertical movement plot around time of quake (source: IRIS/BUD)

Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.5-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

User reports for this quake

At magnitude 2.9, this quake might have been felt very close to the epicenter and under calm conditions.

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

There are no user reports for this quake.

Earlier earthquakes in the same area

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