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M5.0 Earthquake near Mariana Islands region

UTC time: 2026-09-23 13:01:52 UTC Local time: —

Earthquake newsQuakeMap24

First published: 2026-09-23 13:17:11 UTC Content updated: 2026-09-25 13:23:06 UTC

Automatically generated from measurement data by QuakeMap24. Values may change after further analysis.

Magnitude

M5.0

Depth: 306.0 km
Source: USGS

Mariana Islands region

Map

About this earthquake

On September 23, 2026 at 13:01 UTC, a magnitude M5.0 earthquake occurred near Mariana Islands region. The deep hypocenter at about 306 km dampens the shaking felt at the surface. Events of this size can cause damage near the epicenter.

The event was recorded by USGS.

Details

caca5bcc81f32ee2732ee5108634974ccbd46e17

Magnitude

M5.0

Depth

306.0 km

UTC time

2026-09-23 13:01:52 UTC

Local time

—

Country

—

Source

usgs

Coordinates

21.66220, 143.02390

Temperature

28.5°C

Depth profile

Deep

306 km

Why depth matters

Deep quakes are felt over very large areas but rarely cause surface damage.

Depth classes per USGS

Official USGS aftershock forecast

Probability of at least one aftershock at or above the specified magnitude during the entire stated time window. This does not predict an individual earthquake.

Issued: Oct 5, 2026, 1:01 PM UTC · Last checked: Oct 5, 2026, 5:22 PM UTC

Updates are delayed. The last successfully retrieved data are shown.

Oct 5, 2026, 2:00 PM UTC – Oct 6, 2026, 2:00 PM UTC · Expired

Magnitude	Probability ≥ 1	Count (95% interval)
M ≥ 3.0	6.54 %	0–1
M ≥ 4.0	0.74 %	0–0
M ≥ 5.0	0.08 %	0–0
M ≥ 6.0	< 0.01 %	0–0
M ≥ 7.0	< 0.01 %	0–0

Oct 5, 2026, 2:00 PM UTC – Oct 12, 2026, 2:00 PM UTC · Expired

Magnitude	Probability ≥ 1	Count (95% interval)
M ≥ 3.0	25.35 %	0–3
M ≥ 4.0	4.06 %	0–1
M ≥ 5.0	0.44 %	0–0
M ≥ 6.0	0.04 %	0–0
M ≥ 7.0	< 0.01 %	0–0

Oct 5, 2026, 2:00 PM UTC – Nov 4, 2026, 2:00 PM UTC

Magnitude	Probability ≥ 1	Count (95% interval)
M ≥ 3.0	44.81 %	0–8
M ≥ 4.0	10.18 %	0–1
M ≥ 5.0	1.23 %	0–0
M ≥ 6.0	0.13 %	0–0
M ≥ 7.0	0.01 %	0–0

Oct 5, 2026, 2:00 PM UTC – Oct 5, 2027, 2:00 PM UTC

Magnitude	Probability ≥ 1	Count (95% interval)
M ≥ 3.0	67.84 %	0–25
M ≥ 4.0	23.80 %	0–3
M ≥ 5.0	3.70 %	0–1
M ≥ 6.0	0.40 %	0–0
M ≥ 7.0	0.04 %	0–0

The range is the 95% forecast interval for the number of earthquakes. Magnitude thresholds and time windows overlap: do not add the values. Windows already in progress still refer to the entire stated period.

Source: USGS — Operational Aftershock Forecast

Tectonic context

Located on the Philippine Sea Plate.

Near the boundary Philippine Sea ↔ Mariana · about 19 km away

Nearby population centers

Distances are straight-line distances from the epicenter. Population data: GeoNames.

PlaceDistanceDirectionPopulation

Saipan772.8 kmS48'220

GeoNames · CC BY 4.0

Volcanoes nearby

Fukujin

Distance: 55 km ·Stratovolcano ·Elevation: -217 m ·Last eruption: 1974 ·United States
Kasuga 2

Distance: 64 km ·Stratovolcano ·Elevation: -274 m ·United States
Kasuga 1

Distance: 72 km ·Stratovolcano ·Elevation: -598 m ·Last eruption: 1959 ·United States
NW Eifuku

Distance: 107 km ·Stratovolcano ·Elevation: -1'535 m ·United States
Daikoku

Distance: 127 km ·Stratovolcano ·Elevation: -323 m ·United States
Nikko

Distance: 173 km ·Stratovolcano ·Elevation: -392 m ·Japan

Subsequent earthquakes nearby

Events recorded after this earthquake within 150 km. They are not automatically classified as aftershocks.

First 6 hours0

First 24 hours0

First 72 hours0

Strongest subsequent eventM4.3

M4.22026-10-11 05:13:38 UTC13.2 kmMARIANA ISLANDS REGION M4.32026-10-16 03:57:21 UTC13.6 kmMariana Islands region

Comparison of seismic sources

3 sources currently report magnitudes from M4.9 to M5.0.

Measurements can differ because agencies use different networks and calculation methods. Values may be revised.

SourceMagnitudeDepthPosition difference

EMSCM5.0302.0 km5.8 km

GFZM4.9303.0 km9.1 km

USGSM5.0306.0 km0.0 km

No unambiguous area assignment

Context for this earthquake

This event has no unambiguous country assignment in the analysed catalogue. It is therefore not assigned to a regional profile.

Earthquake overview

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#2

Earlier events M≥430

Earlier events M≥53

Compared since2025-01-03

The QuakeMap24 comparison dataset begins on 2024-03-23. Earlier earthquakes may not be included.

Strongest earlier events

M5.32026-03-08 19:07:32 UTC49.3 kmEvent of magnitude 5.3, near of Tokyo (Monde) M5.02025-09-10 16:16:03 UTC94.8 kmVOLCANO ISLANDS, JAPAN REGION M5.02025-04-05 11:32:59 UTC112.7 kmMariana Islands region M4.92025-07-09 12:14:17 UTC130.1 kmMariana Islands Region M4.92025-01-25 03:08:22 UTC145.5 kmVolcano Islands, Japan region

Stats (last 24h)

Global (24h)

583

Country (24h)

—

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