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Mag. 3.1 quake - 22 km southwest of Catarman, Northern Samar, Eastern Visayas, Philippines, on Saturday, Sep 23, 2023 06:29 pm (Manila time) -

Weak magnitude 3.1 earthquake at 22 km depth

23 Sep 10:45 UTC: First to report: PHIVOLCS after 17 minutes.
24 Sep 02:21: Magnitude recalculated from 2.7 to 3.1. Hypocenter depth recalculated from 15.0 to 22.0 km (from 9.3 to 13.7 mi). Epicenter location corrected by 3.1 km (1.9 mi) towards NE.

Earthquake details

Date & time	Sep 23, 2023 10:29:00 UTC -
Local time at epicenter	Saturday, Sep 23, 2023 06:29 pm (Asia/Manila GMT +8)
Status	Confirmed
Magnitude	3.1
Depth	22.0 km
Epicenter latitude / longitude	12.34°N / 124.51°E Northern Samar, Eastern Visayas, Philippines
Antipode	12.34°S / 55.49°W
Shaking intensity	Very weak shaking
Felt	0 reports
Primary data source	PHIVOLCS (Philippine Institute of Volcanology and Seismology)
Nearest volcano	Bulusan (69 km / 43 mi)
Weather at epicenter at time of quake	Overcast Clouds 24.7°C (76 F), humidity: 91%, wind: 3 m/s (6 kts) from SW
Estimated seismic energy released	2.8 x 10⁹ joules (783 kilowatt hours, equivalent to 0.674 tons of TNT) \| about seismic energy

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Nearby places

Distance	Place	Max. shaking intensity(*)	Region	Country
15 km (9 mi) ENE of epicenter	Polangui (pop: 2,650)	II Very weak	Northern Samar, Eastern Visayas	Philippines
21 km (13 mi) WNW of epicenter	Alegria (pop: 5,810)	II Very weak	Northern Samar, Eastern Visayas	Philippines
21 km (13 mi) SSW of epicenter	San Joaquin (pop: 4,500)	II Very weak	Province of Samar, Eastern Visayas	Philippines
22 km (14 mi) NE of epicenter	Catarman (pop: 47,400)	II Very weak	Northern Samar, Eastern Visayas	Philippines
32 km (20 mi) SSE of epicenter	Calbayog City (pop: 67,900)	II Very weak	Province of Samar, Eastern Visayas	Philippines
75 km (47 mi) SE of epicenter	Catbalogan (pop: 68,100)	I Not felt	Province of Samar, Eastern Visayas	Philippines
90 km (56 mi) NW of epicenter	Sorsogon (pop: 82,700)	I Not felt	Bicol	Philippines
457 km (284 mi) WNW of epicenter	Manila (pop: 1,600,000)	Not felt	Capital District, National Capital Region	Philippines

Notes:
(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.

Compare Quake Data

Data for the same earthquake as reported by different agencies

The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.

Mag	Depth	Time GMT	Epicenter	Agency
3.1	22 km (14 mi)	2023-09-23 10:29:00	Philippines: 013 Km N 69° W of Lope De Vega (Northern Samar)	PHIVOLCS (Philippine Institute of Volcanology and Seismology)
3.1	22 km (14 mi)	2023-09-23 10:29:24	Samar, Philippines 0 km (0 mi) epicenter difference with PHIVOLCS	RaspberryShake (RaspberryShake)

Most recent quakes Top 20 past 24 hrs Quakes in Philippines

Seismograms

Seismic station: Davao, Philippines (DAV/IU network) | Distance from quake: 598 km / 371 mi | Show on map | Station Info

Seismic station Davao, Philippines: vertical movement plot around time of quake (source: IRIS/BUD)

Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.5-5.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

User-reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

There are no user reports for this quake.

Earlier earthquakes in the same area

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