On Sunday Evening a Shallow M5.7 AFTERSHOCK struck in the North Pacific Ocean 197km from Morioka (Japan).

Written by Earthquakelist.org on November 9th, 2025. Last updated December 7th, 2025.

In the North Pacific Ocean 197 kilometer from Morioka, Japan, a shallow and significant M5.7 aftershock occurred in the evening of Sunday November 9th, 2025. Around 1.2 million people have been exposed to shaking.

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Earthquake Summary

This earthquake hit under water in the North Pacific Ocean, 154 kilometers (95 mi) off the coast of Japan, 197 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 18:28 (Tokyo Time) - Nov 9, 2025 09:28 Universal Time.
Location:	197 km east of Morioka, Iwate, Japan. Coordinates 39°36'43"N 143°26'59"E.
Map:	Map of area around epicenter. Click to open in Google Maps.
Magnitude:	MAG 5.7 Detected by 22 stations. Maximum Error Range ±0.066 .
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 1.2 million people exposed to shaking

The USGS has published a report estimating the number of people exposed to this earthquake. Acoording to their analysis, roughly 1.2 million have been exposed to shaking at an MMI level of II or higher.

Weak shaking and probably no damage may have been experienced by an estimated 1,060,000 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 Miyako in Iwate, Japan. Miyako is located 129 kilometer (80 mi) east of the epicenter. The intensity of shaking and damage in Miyako is estimated to be around level III on the Modified Mercalli Intensity scale (weak shaking, probably no damage).

Multiple major population centers exist within 300km of the earthquake that struck today. Sendai is located 269 km to the southwest (intensity unknown, possibly low). Morioka is located 197 km to the west (intensity unknown, possibly low). Hachinohe is located 193 km to the west-northwest and experienced an intensity of III (weak shaking, probably no damage).

The table below provides an overview of all places in proximity of today's earthquake. Where available, the estimated intensity on the Modified Mercalli Intensity Scale in each place is included. Places where this information is omitted likely experienced little impact.

Overview of nearby places

Earthquake Intensity Map

The maximum intensity (MMI Scale) caused by this earthquake is III. The map below shows in which areas this earthquake was the most and least impactful. It is based on data from the US Geographic Survey.

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

Approximately 1 hr before this earthquake hit, a larger 6.8 magnitude earthquake struck 15 km (10 mi) south-southwest of this one. For that reason, we classify the Mag. 5.7 earthquake as an 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, 35 earthquakes with a magnitude of 5.7 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 3 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 07/12/25 01:18 (). 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 us6000rmex
2. European-Mediterranean Seismological Centre (EMSC): Earthquake 20251109_0000171
3. Geonames.org: World Cities Database
4. Google Maps: Static API
5. Earthquakelist.org: Historic Earthquakes Database

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