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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) -

Mag. 3.1 quake - 22 km southwest of Catarman, Northern Samar, Eastern Visayas, Philippines, on Saturday, Sep 23, 2023 06:29 pm (Manila time) 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 & timeSep 23, 2023 10:29:00 UTC -
Local time at epicenterSaturday, Sep 23, 2023 06:29 pm (Asia/Manila GMT +8)
Depth22.0 km
Epicenter latitude / longitude12.34°N / 124.51°E Northern Samar, Eastern Visayas, Philippines
Antipode12.34°S / 55.49°W
Shaking intensityVery weak shaking
Felt0 reports
Primary data sourcePHIVOLCS (Philippine Institute of Volcanology and Seismology)
Nearest volcanoBulusan (69 km / 43 mi)
Weather at epicenter at time of quakeOvercast Clouds 24.7°C (76 F), humidity: 91%, wind: 3 m/s (6 kts) from SW
Estimated seismic energy released2.8 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
(pop: 2,650)
Very weak
Northern Samar, Eastern Visayas
21 km (13 mi)
WNW of epicenter
(pop: 5,810)
Very weak
Northern Samar, Eastern Visayas
21 km (13 mi)
SSW of epicenter
San Joaquin
(pop: 4,500)
Very weak
Province of Samar, Eastern Visayas
22 km (14 mi)
NE of epicenter
(pop: 47,400)
Very weak
Northern Samar, Eastern Visayas
32 km (20 mi)
SSE of epicenter
Calbayog City
(pop: 67,900)
Very weak
Province of Samar, Eastern Visayas
75 km (47 mi)
SE of epicenter
(pop: 68,100)
Not felt
Province of Samar, Eastern Visayas
90 km (56 mi)
NW of epicenter
(pop: 82,700)
Not felt
457 km (284 mi)
WNW of epicenter
(pop: 1,600,000)
Not felt
Capital District, National Capital Region
(*) 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)


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
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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.

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