Contact | RSS | EN | DE | EL | ES | FR | IT | RU

Minor mag. 2.6 earthquake - Fukushima, 78 km southeast of Niigata, Japan, on Tuesday, Oct 26, 2021 at 2:39 am (GMT +9) -

Minor magnitude 2.6 earthquake at 172 km depth

25 Oct 17:46 UTC: First to report: NIED after 6 minutes.

Earthquake details

Date & time	Oct 25, 2021 17:39:49 UTC -
Local time at epicenter	Tuesday, Oct 26, 2021 at 2:39 am (GMT +9)
Status	Confirmed
Magnitude	2.6
Depth	172.2 km
Epicenter latitude / longitude	37.301°N / 139.487°E (Minamiaizu-gun, Fukushima, Japan)
Antipode	37.301°S / 40.513°W
Shaking intensity	Not felt
Felt
Primary data source	NIED (National Research Institute for Earth Science and Disaster Resilience)
Nearest volcano	Numazawa (18 km / 11 mi)
Nearby towns and cities	48 km (30 mi) ESE of Tochio-honchō (Nagaoka, Niigata) (pop: 23,000) \| Show on map \| Quakes nearby 51 km (32 mi) SW of Kitakata (pop: 37,100) \| Show on map \| Quakes nearby 59 km (36 mi) ESE of Nagaoka (Niigata) (pop: 195,300) \| Show on map \| Quakes nearby 59 km (37 mi) SE of Sandyo (Prefectura de Niigata) (pop: 82,900) \| Show on map \| Quakes nearby 64 km (40 mi) SSE of Niitsu (Niigata) (pop: 65,900) \| Show on map \| Quakes nearby 78 km (48 mi) SE of Niigata (pop: 505,300) \| Show on map \| Quakes nearby 79 km (49 mi) W of Sukagawa (pop: 68,800) \| Show on map \| Quakes nearby 80 km (50 mi) W of Kōriyama (pop: 340,600) \| Show on map \| Quakes nearby 100 km (62 mi) WSW of Fukushima (pop: 294,200) \| Show on map \| Quakes nearby 180 km (112 mi) N of Tokyo (pop: 8,336,600) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Moderate Rain 8.1°C (47 F), humidity: 99%, wind: 1 m/s (2 kts) from NNW
Estimated seismic energy released	5 x 10⁸ joules (139 kilowatt hours, equivalent to 0.12 tons of TNT) \| about seismic energy

Show interactive Map

[smaller] [bigger]

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
2.6	172 km	Japan: WESTERN FUKUSHIMA PREF	NIED

Most recent quakes Top 20 past 24 hrs Quakes in Japan

Seismograms

Seismic station: Miyagi Marumori (JMM/JP network) | Distance from quake: 131 km / 81 mi | Show on map | Station Info

Seismic station Miyagi Marumori: 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

Show less

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

Seismic station: Matsushiro, Japan (MAJO/IU network) | Distance from quake: 142 km / 88 mi | Show on map | Station Info

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

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

Seismic station: Gifu Kurokawa (JGF/JP network) | Distance from quake: 268 km / 167 mi | Show on map | Station Info

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

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

Seismic station Gifu Kurokawa: 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: Shizuoka Sagara (JSG/JP network) | Distance from quake: 314 km / 195 mi | Show on map | Station Info

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

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

Seismic station Shizuoka Sagara: 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: Aomori Tenma (JTM/JP network) | Distance from quake: 411 km / 255 mi | Show on map | Station Info

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

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

Seismic station Aomori Tenma: 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 2.6, 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

Click here to search our database for earlier earthquakes in the same area since 1900!

Try our free app!

Android | iOS version

Why is there advertising on this site?

Support us - Help us upgrade our services!

We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:

Improved multilanguage support
Tsunami alerts
Faster responsiveness

Thanks to your past donations, these features have been added recently:

Design upgrade
Detailed quake stats
Additional seismic data sources

Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS

Thank you!

Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.
Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.

Volcanoes & Earthquakes