# M6.0 Earthquake: 58 km SSE of Shima, Japan

Updated 00:37 UTC, 1 Nov 2026. Canonical: https://monitorworld.app/earthquake/2026-10-31-m6-0-shima-japan

A **magnitude 6.0** earthquake struck 58 km SSE of Shima, Japan at 22:15 UTC on 31 Oct 2026, at a depth of 352 km, reported by USGS. USGS PAGER issued a green alert: little or no damage and a low chance of deaths. USGS did not set a tsunami flag for this quake. No M2.5+ aftershock had been listed within 50 km when this page was updated.

## Key numbers

- Magnitude (USGS): **M6.0** (mww)
- Depth: **352 km** (deep)
- USGS PAGER impact alert: **GREEN** (estimated impact)
- Aftershocks M2.5+ so far: **0** (within 50 km)

## Nearest places

- [59 KM] Shima, Mie, Japan (59 km from the epicentre, quake was SSE of here, population 47,774)
- [75 KM] Toba, Mie, Japan (75 km from the epicentre, quake was S of here, population 17,741)
- [78 KM] Owase, Mie, Japan (78 km from the epicentre, quake was ESE of here, population 16,910)
- [78 KM] Ise, Mie, Japan (78 km from the epicentre, quake was SSE of here, population 123,533)
- [110 KM] Tsu, Mie, Japan (110 km from the epicentre, quake was SSE of here, population 163,461)
- [94 KM] Matsusaka, Japan (94 km from the epicentre, quake was SSE of here, population 159,000)
- [112 KM] Toyohashi, Japan (112 km from the epicentre, quake was SSW of here, population 377,000)

## Strongest aftershocks so far

No M2.5+ aftershock listed yet.

## Key context

### Tectonic setting

**Nankai Trough and Ryukyu Trench.** The Philippine Sea Plate subducts north-west beneath south-west Japan along the Nankai Trough and beneath the Ryukyu Islands along the Ryukyu Trench. The Nankai Trough produced great quakes in 1944 and 1946, and Japan's government treats it as one of the country's highest long-term hazards.

The USGS moment tensor shows strike-slip faulting: the two sides of the fault slid sideways past each other.

At 352 km it was a deep-focus quake, inside a plate that has sunk deep into the mantle. Deep quakes are felt widely but weakly and do not cause tsunamis.

### Shaking and impact

USGS PAGER estimates the impact from the shaking and the number of people exposed. For this quake it issued a green alert: little or no damage and a low chance of deaths (fatality alert: green, economic loss alert: green). PAGER is an early estimate and can change as reports come in.

The USGS ShakeMap estimates the strongest shaking at intensity III on the Modified Mercalli scale (weak).

16 people sent a "Did You Feel It?" report to USGS, with the strongest reported intensity III (weak).

### Aftershocks

This page counts quakes of M2.5 or more within 50 km after the main shock, from the USGS catalog (last checked 00:37 UTC, 1 Nov 2026): 0 aftershocks so far.

Aftershocks are normal after a quake of this size. They usually become less frequent over days and weeks, but a strong aftershock can still happen, and in a few sequences a later quake is larger. No one can predict their exact time or size; follow the official agency for your area.

### Earthquake history within 250 km

Since 1976, USGS lists 294 quakes of M5 or more within 250 km of this epicentre, about 5.9 a year. Since 1900 the same circle had 80 quakes of M6.0 or larger.

Largest earlier quakes within 250 km, USGS catalog since 1900 (M6+).

| Magnitude | Place (USGS) | Date | Depth |
| --- | --- | --- | --- |
| M8.3 | 68 km S of Shing?, Japan | 1946-12-20 | 15 km |
| M8.1 | 1944 Toankai Earthquake | 1944-12-07 | 15 km |
| M7.4 | 67 km SSW of Shing?, Japan | 1948-04-17 | 15 km |
| M7.4 | 50 km SSW of Ōyama, Japan | 1906-01-21 | 300 km |
| M7.4 | 118 km ESE of Shing?, Japan | 2004-09-05 | 10 km |
| M7.2 | 77 km ESE of Owase, Japan | 1984-01-01 | 368 km |
| M7.2 | 94 km SE of Shing?, Japan | 2004-09-05 | 14 km |
| M7.2 | 38 km SSW of Shimoda, Japan | 1905-10-24 | 15 km |

### Official information

- [Japan Meteorological Agency (JMA)](https://www.jma.go.jp/jma/indexe.html)
- [EMSC (European-Mediterranean Seismological Centre)](https://www.emsc-csem.org/)
- [USGS event page for this quake](https://earthquake.usgs.gov/earthquakes/eventpage/us7000tuku) (ShakeMap, PAGER, felt reports)
- [tsunami.gov](https://www.tsunami.gov/) for US tsunami bulletins

### Data status

USGS review status: reviewed. Magnitude type: mww. USGS last updated this event on 1 Nov 2026 at 00:22 UTC. Magnitude, depth and location can still be revised; this page keeps the same address if they change.

## FAQ

### How strong was the earthquake near Shima, Japan?

USGS measured it at magnitude 6.0 (mww), 352 km deep. The strongest estimated shaking was intensity III (weak). Quakes of M6 to 6.9 are classed as strong.

### Was there a tsunami?

USGS did not set a tsunami flag for this quake, and at 352 km depth it was too deep to move the sea floor much. If you are on a coast and feel strong or long shaking, move to high ground anyway, and follow local officials.

### Was the earthquake felt?

Yes. 16 people reported it to USGS "Did You Feel It?", with reports up to intensity III.

### Will there be more aftershocks?

Aftershocks are likely to continue for days to weeks, becoming less frequent over time. So far 0 aftershocks of M2.5+ have been listed. Most sequences do not produce a larger quake, but some do. No one can predict the time or size of the next one; follow Japan Meteorological Agency (JMA).

### What should I do after a strong earthquake?

Expect aftershocks: Drop, Cover and Hold On when shaking starts again. Check for injuries and damage, stay out of damaged buildings, and use text messages instead of calls so emergency lines stay free. On a coast, move to high ground after strong shaking. Follow your local officials.

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## Sources

- [USGS event page](https://earthquake.usgs.gov/earthquakes/eventpage/us7000tuku): magnitude, location, ShakeMap, PAGER and Did You Feel It? data for this event. Public domain. Credit: U.S. Geological Survey.
- [USGS ComCat (FDSN event web service)](https://earthquake.usgs.gov/fdsnws/event/1/): the USGS earthquake catalog, used for the 30-year counts, history and aftershocks. Public domain. Credit: U.S. Geological Survey.
- [USGS Geoserve](https://earthquake.usgs.gov/ws/geoserve/): nearest places to the epicentre.
- [GeoNames](https://www.geonames.org/): large-city coordinates, CC BY 4.0.

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