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Minor mag. 2.9 earthquake - 23 km east of Shiozawa, Minamiuonuma Shi, Niigata, Japan, on Friday, Dec 2, 2022 at 8:42 am (GMT +9) -

Minor magnitude 2.9 earthquake at 149 km depth

1 Dec 23:49 UTC: First to report: NIED after 7 minutes.

Earthquake details

Date & time	Dec 1, 2022 23:42:09 UTC -
Local time at epicenter	Friday, Dec 2, 2022 at 8:42 am (GMT +9)
Status	Confirmed
Magnitude	2.9
Depth	149.0 km
Epicenter latitude / longitude	36.987°N / 139.103°E (Minamiuonuma Shi, Niigata, Japan)
Antipode	36.987°S / 40.897°W
Shaking intensity	Not felt
Felt
Primary data source	NIED (National Research Institute for Earth Science and Disaster Resilience)
Nearest volcano	Hiuchi (17 km / 11 mi)
Nearby towns and cities	23 km (14 mi) ESE of Shiozawa (Minamiuonuma) (pop: 20,200) \| Show on map \| Quakes nearby 34 km (21 mi) ESE of Tōkamachi (pop: 41,100) \| Show on map \| Quakes nearby 40 km (25 mi) N of Numata (Gunma) (pop: 45,500) \| Show on map \| Quakes nearby 44 km (27 mi) SE of Ojiya (pop: 40,500) \| Show on map \| Quakes nearby 56 km (35 mi) SSE of Nagaoka (pop: 195,300) \| Show on map \| Quakes nearby 65 km (40 mi) SE of Kashiwazaki (pop: 86,200) \| Show on map \| Quakes nearby 100 km (62 mi) S of Niigata (pop: 505,300) \| Show on map \| Quakes nearby 154 km (95 mi) NNW of Tokyo (pop: 8,336,600) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Light Snow -4.8°C (23 F), humidity: 92%, wind: 2 m/s (4 kts) from NW
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	149 km	Japan: NW 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: 94 km / 58 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

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Seismic station Matsushiro, Japan: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Matsushiro, Japan: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake, showing horizontal E-W and N-S ground movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Ibaraki Yasato (JYT/JP network) | Distance from quake: 128 km / 80 mi | Show on map | Station Info

Seismic station Ibaraki Yasato: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Ibaraki Yasato: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Ibaraki Yasato: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Miyagi Marumori (JMM/JP network) | Distance from quake: 178 km / 111 mi | Show on map | Station Info

Seismic station Miyagi Marumori: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Miyagi Marumori: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Miyagi Marumori: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Inuyama, Japan (INU/G network) | Distance from quake: 260 km / 162 mi | Show on map | Station Info

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

Seismic station Inuyama, Japan: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Inuyama, Japan: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Kyoto Wachi (JWT/JP network) | Distance from quake: 383 km / 238 mi | Show on map | Station Info

Seismic station Kyoto Wachi: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Kyoto Wachi: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Kyoto Wachi: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. 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.

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