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Philippines · Surigao del Norte

M5.1 Earthquake near Alegria, Surigao del Norte (Philippines)

UTC time: 2026-08-21 09:22:36 UTC Local time: —
Earthquake newsQuakeMap24
Archive record · original publication time was not recorded Content updated:

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

Map

M5.1 Earthquake near Alegria, Surigao del Norte (Philippines) · 2026-08-21 — Map showing the location of the epicenter
M5.1 Earthquake near Alegria, Surigao del Norte (Philippines) · 2026-08-21 — Map showing the location of the epicenter

About this earthquake

On August 21, 2026 at 09:22 UTC, a magnitude M5.1 earthquake occurred near Alegria, Surigao del Norte (Philippines). The hypocenter lay relatively close to the surface at around 10 km, increasing how strongly it was felt. Earthquakes of this magnitude can damage poorly built structures.

The event was recorded by USGS. Philippines: over the past 24 hours, QuakeMap24 logged 4 earthquakes, the strongest at M4.3.

Details

ID
8f3d27bd5daf49e5822256bd9e5ecb69bacb8f57
Magnitude
M5.1
Depth
10.0 km
UTC time
2026-08-21 09:22:36 UTC
Local time
—
Country
Philippines
State
Surigao del Norte
City
Alegria
Village
San Pedro
Source
usgs
Coordinates
9.48330, 125.57840
Temperature
28.2°C

Depth profile

Depth profile Depth: 10 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 10 km
Shallow
10 km
10 km — shallower than the regional average (29.5 km)
Regional average: 29.5 km
Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

Felt reports

2felt reports at EMSC / LastQuake

Voluntary reports of feeling this earthquake. The count is not an intensity measurement and is not added to USGS DYFI reports.

Data updated: Aug 21, 2026, 9:26 AM UTC · Last checked: Sep 21, 2026, 12:07 AM UTC

Source: EMSC / LastQuake

Estimated impact

5 Felt reports · max reported intensity 3.8

Tectonic context

Located on the Sunda Plate.
Near the boundary Philippine Sea ↔ Sunda · about 160 km away

Nearby population centers

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

PlaceDistanceDirectionPopulation
Surigao City35.2 kmN87'832
Butuan59.5 kmS309'709
Cagayan de Oro151.2 kmSW741'617

GeoNames · CC BY 4.0

Volcanoes nearby

  • Cabalían
    Distance: 97 km ·Stratovolcano ·Elevation: 912 m ·Last eruption: 1820 ·Philippines
  • Camiguin
    Distance: 104 km ·Stratovolcano(es) ·Elevation: 1'552 m ·Last eruption: 1953 ·Philippines
  • Musuan
    Distance: 187 km ·Lava dome ·Elevation: 610 m ·Philippines
  • Ragang
    Distance: 232 km ·Stratovolcano ·Elevation: 2'790 m ·Last eruption: 1916 ·Philippines
  • Leonard Range
    Distance: 239 km ·Stratovolcano ·Elevation: 1'080 m ·Last eruption: 80 ·Philippines
  • Makaturing
    Distance: 247 km ·Stratovolcano ·Elevation: 1'818 m ·Last eruption: 1882 ·Philippines

Radius · 100 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Surigao AirportPhilippines · SUG · RPMS
    32.1 kmStraight-line distance
  • Bancasi AirportPhilippines · BXU · RPME
    60.1 kmStraight-line distance
  • Siargao AirportPhilippines · IAO · RPNS
    63.5 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-10-05

This selection shows geographic proximity, not a hazard zone or confirmed impacts. Distances use recorded site coordinates. Sources & data dates

Subsequent earthquakes nearby

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

First 6 hours3
First 24 hours5
First 72 hours6
Strongest subsequent eventM5.0
M4.22026-08-21 10:13:55 UTC21.1 kmPetogo M3.12026-08-21 10:35:30 UTC30.5 kmCabadbaran M4.22026-08-21 11:20:03 UTC19.6 kmPetogo M5.02026-08-22 04:44:08 UTC9.5 kmKitcharao M3.52026-08-22 05:24:27 UTC20.4 kmMagdagooc M3.12026-08-22 21:07:46 UTC20.6 kmPetogo M3.52026-08-24 15:23:00 UTC94.9 kmMINDANAO, PHILIPPINES M3.12026-08-24 16:02:13 UTC57.4 kmDapa M4.72026-08-25 01:59:04 UTC148.7 km61 km ENE of Aras-asan, Philippines M3.32026-08-25 16:51:34 UTC24.8 kmJabonga M3.12026-08-26 18:33:54 UTC89.4 kmSurigao del Norte M3.32026-08-26 19:00:35 UTC135.9 kmMINDANAO, PHILIPPINES

Comparison of seismic sources

3 sources currently report magnitudes from M5.2 to M5.3.

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

SourceMagnitudeDepthPosition difference
USGSM5.210.0 km30.5 km
GFZM5.310.0 km16.2 km
EMSCM5.324.0 km15.1 km

Philippines

Context for this earthquake

05 Oct 2025 – 05 Oct 2026 · M ≥ 3.0 · 1,992 Catalogue entries

Sufficiently reliable matching data are not currently available for a direct comparison. The area profile shows the available records and their limitations.

Open seismic profile

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#35
Earlier events M≥4180
Earlier events M≥558
Compared since2025-01-07

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

Strongest earlier events

M6.42025-10-16 23:03:15 UTC65.6 km0 km WSW of Union, Philippines M6.12025-10-16 23:03:16 UTC65.6 kmMINDANAO, PHILIPPINES M6.12025-10-16 23:03:09 UTC68.7 kmMindanao, Philippines M6.12025-10-11 14:33:00 UTC106.6 kmMINDANAO, PHILIPPINES M6.12025-10-11 14:32:59 UTC123.0 kmPhilippines [Sea]

Historic earthquake map · Philippines

Open history map
Explore recent and long-term earthquake activity in this country. Use filters to narrow down by magnitude, depth, and date range.

Country statistics · Philippines

Country overview
View earthquake KPIs, strongest and latest events, and averages for this country.

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