On Sunday Evening a Shallow M5.4 AFTERSHOCK struck in the North Pacific Ocean 194km from Morioka (Japan).

Written by Earthquakelist.org on November 9th, 2025. Last updated December 5th, 2025.

In the evening of Sunday November 9th, 2025, a shallow and significant Magnitude 5.4 aftershock hit in the North Pacific Ocean 194 kilometer from Morioka, Japan. Shaking may have been felt by a total of 1.6 million people.

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Earthquake Summary

This earthquake hit under water in the North Pacific Ocean, 148 kilometers (92 mi) off the coast of Japan, 194 kilometer east of Morioka in Iwate. The center of this earthquake had a very shallow depth of 10 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.

Date and Time:	Nov 9, 2025 18:10 (Tokyo Time) - Nov 9, 2025 09:10 Universal Time.
Location:	194 km east of Morioka, Iwate, Japan. Coordinates 39°29'14"N 143°23'53"E.
Map:	Map of area around epicenter. Click to open in Google Maps.
Magnitude:	MAG 5.4 Detected by 8 stations. Maximum Error Range ±0.11 .
Depth:	10 km (6 mi) A very shallow depth.
Max. Intensity:	IV Light On the Modified Mercalli Scale.
Tsunami Risk:	Low tsunami risk Earthquakes under MAG-6.5 do not usually cause tsunami's. Always stay cautious - More info here.

Minimal impact predicted

Based on scientific estimates by the US Geographic Survey (USGS), the risk of high fatalities for this earthquake is classified at level GREEN (low). They expect an 65% likelyhood of between 0 and 1 fatalities, and a 96% chance that the number of fatalities falls no higher than 10.

The USGS classifies the economic impact of this earthquake at level GREEN (low). They expect an 65% likelyhood of between 0 and 1 million US Dollars in economic damage and impact, and a 96% chance that the economic impact of this earthquake falls no higher than 10 million USD.

Roughly 1.6 million people exposed to shaking

An estimated 1.6 million have been exposed to shaking (An MMI or Modified Mercalli Intensity level II or higher) as a result of this earthquake according scientific estimates published by the USGS.

Weak shaking and probably no damage may have been experienced by an estimated 1,201,000 people. At III, it is the highest MMI level this earthquake has caused. All exposure to shaking was within the borders of Japan .

Nearby towns and cities

This earthquake may have been felt in Japan . The closest significant population center near the earthquake is Yamada in Iwate, Japan. Yamada is located 124 kilometer (77 mi) east of the epicenter. Yamada experienced an earthquake intensity (MMI Scale) of roughly III. That level implies weak shaking and probably no damage.

Multiple large cities are in proximity of today's earthquake. Sendai is located 258 km to the west-southwest (intensity unknown, possibly low). Morioka is located 194 km to the west and experienced an intensity of III (weak shaking, probably no damage). Hachinohe is located 197 km to the northwest and experienced an intensity of III (weak shaking, probably no damage).

A complete list of nearby places is included below. Estimated intensity data (MMI) sourced from a shake-map published by the US Geographic Survey is shown where available (cities without data probably experienced little impact).

Overview of nearby places

Earthquake Intensity Map

The graph below overlays a map of the region around the epicenter with earthquake intensity data provided by the US Geographic Survey. The highest intensity level detected for this earthquake is III.

I Not felt

II Weak

III Weak

IV Light

V Moderate

VI Strong

VII Very Strong

VIII Severe

IX Violent

X Extreme

This is likely an aftershock

This earthquake is likely an aftershock of the MAG-6.8 earthquake that struck 1 hr earlier. That main earthquake hit 1.7 km (1.1 mi) west of the epicenter of this MAG-5.4 aftershock.

Overview of foreshocks and aftershocks

More earthquakes coming?

Aftershocks are usually at least 1 order of magnitude less strong than main shocks. The more time passes, the smaller the chance and likely strength of any potential aftershocks.

In only six percent of cases, significant earthquakes are followed by a larger main shock, making the current earthquake a foreshock. While the chance of this happening is not so large, it is adviced to maintain cautiousness in the hours and days following a major earthquake.

Earthquakes like this happen often in the region

Earthquakes of this strength are very common in the region. In total, 75 earthquakes with a magnitude of 5.4 or higher have been registered within 300km (186 mi) of this epicenter in the past 10 years. This comes down to an average of once every 2 months.

Low tsunami risk

Based on early data it appears this earthquake was not strong enough (lower than MAG-6.5) to be likely to cause destructive tsunami's. However this earthquake appeared to have hit at a shallow depth under sea, so stay cautious and monitor advice from local authorities.

Tsunami Risk Factors

Sources

Last updated 05/12/25 00:58 (). This article is automatically generated based on available data. We keep checking multiple sources for additional information. This article gets updated as new details on this earthquake become available.

1. US Geographic Society (USGS): Earthquake us6000rmet
2. European-Mediterranean Seismological Centre (EMSC): Earthquake 20251109_0000163
3. Geonames.org: World Cities Database
4. Google Maps: Static API
5. Earthquakelist.org: Historic Earthquakes Database

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