Significant M5.8 AFTERSHOCK hit in the North Pacific Ocean near Hachinohe (Japan) on Sunday Night.

Written by Earthquakelist.org on June 27th, 2026.

In the early morning of Sunday June 28th, 2026, a significant M5.8 aftershock hit in the North Pacific Ocean 84 kilometer from Hachinohe, Japan. Roughly 4.1 million people may have felt this earthquake.

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Earthquake Summary

This earthquake hit under water in the North Pacific Ocean, 57 kilometers (35 mi) off the coast of Japan, 84 kilometer east of Hachinohe in Aomori. The center of this earthquake had a quite shallow depth of 34 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.

Date and Time:	Jun 28, 2026 05:21 (Tokyo Time) - Jun 27, 2026 20:21 Universal Time.
Location:	84 km east of Hachinohe, Aomori, Japan. Coordinates 40°12'22"N 142°24'49"E.
Map:	Map of area around epicenter. Click to open in Google Maps.
Magnitude:	MAG 5.8 Detected by 30 stations. Maximum Error Range ±0.057 .
Depth:	34 km (21 mi) A quite shallow depth.
Max. Intensity:	V Moderate 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 90% likelyhood of between 0 and 1 fatalities.

The USGS classifies the economic impact of this earthquake at level GREEN (low). They expect an 90% likelyhood of between 0 and 1 million US Dollars in economic damage and impact.

Roughly 4.1 million people exposed to shaking

An estimated 4.1 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.

An estimated 553,300 people were exposed to level IV. At this level, light shaking and likely no damage can be expected. The majority of people (roughly 3.5 million) live in an area exposed to level III, where weak shaking and probably no damage is expected. All exposure to shaking was within the borders of Japan .

Nearby towns and cities

This earthquake may have been felt in Japan . Miyako in Iwate, Japan is the nearest significant place from the epicenter. The earthquake occurred 74 kilometer (46 mi) north-east of Miyako. 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. Sapporo is located 330 km to the north (intensity unknown, possibly low). Sendai is located 253 km to the southwest (intensity unknown, possibly low). Hachinohe is located 84 km to the west and experienced an intensity of IV (light shaking, likely 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 IV.

I Not felt

II Weak

III Weak

IV Light

V Moderate

VI Strong

VII Very Strong

VIII Severe

IX Violent

X Extreme

Shaking reported by 6 people

People that feel an earthquake may report their experience to the US Geographic Survey. Currently, 6 people have reported shaking in 5 places, all within Japan.We keep updating this article as more ground reports become available. You may report that you felt this earthquake here.

Places with most reports:

• Misawa, Aomori, Japan: 2 people.
• Obihiro, Hokkaido, Japan: 1 person.
• Sendai, Miyagi, Japan: 1 person.
• Hamamatsu, Shizuoka, Japan: 1 person.
• Tanashi, Tokio, Japan: 1 person.

This is likely an aftershock

This earthquake was an aftershock. A larger mag. 6.9 earthquake struck 28 km (18 mi) west in advance of this 5.8 earthquake around 3 days earlier.

Overview of foreshocks and aftershocks

More earthquakes coming?

The risk of aftershocks decreases rapidly over time. Usually, aftershocks are at least one order of magnitude lower than a main shock.

The chance that a significant earthquake like this one is followed by an even larger earthquake is not so large. On average, scientists estimate a 94% chance that a major earthquake will not be followed by an even larger one. It is still adviced to be aware of this risk

Earthquakes like this happen often in the region

Earthquakes of this strength are very common in the region. In total, 45 earthquakes with a magnitude of 5.8 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 27/06/26 23:58 (). As more information on this earthquake becomes available this article will be updated. This article is automatically composed based on data originating from multiple sources.

1. US Geographic Society (USGS): Earthquake us6000t8qd
2. European-Mediterranean Seismological Centre (EMSC): Earthquake 20260627_0000292
3. Geonames.org: World Cities Database
4. Google Maps: Static API
5. Earthquakelist.org: Historic Earthquakes Database

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