5.7

M5.7 Earthquake in the Izu Islands, Japan region — August 4, 2022

2022-08-04 03:39:45 UTC (2022-08-04) · approx. 1:39 PM UTC+10 local

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MagnitudeM5.7(mww)
Time03:39 UTC≈ 1:39 PM UTC+10
Depth11.5 kmshallow crustal
Coordinates32.612°, 142.529°
Felt byNo felt reports
Status✓ Reviewed by USGS· green PAGER
green Alert— no significant casualties or damage expected

On August 4, 2022 at 03:39 UTC, a magnitude 5.7 shallow crustal earthquake struck in the Izu Islands, Japan region, at a depth of 11.5 km and coordinates 32.6119°, 142.5292°. The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. This earthquake was detected by 319 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 500, placing it among routine seismic activity.

Physical scale: An earthquake of magnitude 5.7 releases seismic energy equivalent to roughly 5 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 5.2 km — a useful intuition for the size of the slip patch on the fault.

The epicenter is located in Japan, a region characterized by the intersection of four tectonic plates — Pacific, Philippine Sea, Eurasian, and North American — creating multiple subduction zones. The nearest mapped fault system is the Japan Trench. View all earthquakes in Japan.

Learn more: Magnitude scale · Aftershock sequences

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Map showing earthquake epicenter at 32.61°, 142.53°

ShakeMap — predicted shaking intensity

Modeled ground-motion intensity contoured on the Modified Mercalli scale (MMI). Computed by the USGS from the moment-tensor solution and regional ground-motion prediction equations.

USGS ShakeMap intensity contours for the M5.7 earthquake near Izu Islands, Japan region

Source: U.S. Geological Survey ShakeMap. View interactive ShakeMap on USGS

Earthquake Details

Magnitude
5.7 mww
Depth
11.5 km
shallow crustal
Location
32.6119°N
142.5292°E
Intensity (MMI)
0.0
weak

Technical Information

Event ID
us6000i7xr
Event Type
earthquake
Status
✓ Reviewed
Significance
500
Stations Used
319
Azimuthal Gap
26.0°
Min Station Distance
2.340°
RMS Residual
0.54 sec
Last Updated
2022-10-12 14:50:23 UTC

Nearby Earthquakes (Last 7 Days)

4.6
219 km SSE of Wada, Japan
3 days ago · 35.0 km deep

Common Questions

How strong was the magnitude 5.7 earthquake in the Izu Islands, Japan region?

The magnitude 5.7 earthquake that struck in the Izu Islands, Japan region on August 4, 2022 at 03:39 UTC had a depth of 11.5 km. For context, this was a moderate earthquake that could be widely felt.

Where did the earthquake occur?

The earthquake epicenter was located at 32.6119°, 142.5292°, which is in the Izu Islands, Japan region. View all earthquakes in Japan.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.7 earthquakes can continue for days to weeks and gradually diminish over time.

Has Japan had earthquakes this big before?

The largest recorded earthquake in Japan was the M9.1 Tohoku earthquake of March 11, 2011. Today's magnitude 5.7 event is significantly smaller than that historical record.

Actions

View on USGSDid You Feel It?

Location

Japan
View all Japan earthquakes

Authoritative source: USGS event page (event ID: us6000i7xr). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2022, August 4, 2022). M5.7 Earthquake in the Izu Islands, Japan region — August 4, 2022. Retrieved October 12, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000i7xr/