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Mag. 4.1 earthquake - Philippine Sea, 28 km east of Maasin, Philippines, on Wednesday, Aug 30, 2023 07:07 pm (Manila time) -

Moderate magnitude 4.1 earthquake at 14 km depth

30 Aug 11:20 UTC: First to report: PHIVOLCS after 13 minutes.
30 Aug 19:30: Magnitude recalculated from 3.7 to 4.1. Hypocenter depth recalculated from 11.0 to 12.0 km (from 6.8 to 7.5 mi). Epicenter location corrected by 7.8 km (4.8 mi) towards SW.
31 Aug 04:45: Hypocenter depth recalculated from 12.0 to 14.0 km (from 7.5 to 8.7 mi). Epicenter location corrected by 5.5 km (3.4 mi) towards NE.

Earthquake details

Date & time	Aug 30, 2023 11:07:00 UTC -
Local time at epicenter	Wednesday, Aug 30, 2023 07:07 pm (Asia/Manila GMT +8)
Status	Confirmed
Magnitude	4.1
Depth	14.0 km
Epicenter latitude / longitude	10.11°N / 125.1°E Philippine Sea, Eastern Visayas, Philippines
Antipode	10.11°S / 54.9°W
Shaking intensity	Light shaking near epicenter
Felt	0 reports
Primary data source	PHIVOLCS (Philippine Institute of Volcanology and Seismology)
Nearest volcano	Cabalian (24 km / 15 mi)
Weather at epicenter at time of quake	Overcast Clouds 27°C (81 F), humidity: 79%, wind: 3 m/s (6 kts) from WSW
Estimated seismic energy released	8.9 x 10¹⁰ joules (24.8 megawatt hours, equivalent to 21.3 tons of TNT) \| about seismic energy

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Nearby places

Distance	Place	Max. shaking intensity(*)	Region	Country
6 km (4 mi) NNE of epicenter	Liloan (pop: 3,550)	IV Light	Southern Leyte, Eastern Visayas	Philippines
9 km (5 mi) SE of epicenter	San Francisco (pop: 2,680)	IV Light	Southern Leyte, Eastern Visayas	Philippines
12 km (8 mi) WNW of epicenter	Malitbog (pop: 2,800)	IV Light	Southern Leyte, Eastern Visayas	Philippines
18 km (11 mi) WSW of epicenter	Macrohon (pop: 2,830)	III Weak	Southern Leyte, Eastern Visayas	Philippines
28 km (17 mi) W of epicenter	Maasin (pop: 18,300)	III Weak	Southern Leyte, Eastern Visayas	Philippines
33 km (21 mi) NNW of epicenter	Sogod (pop: 8,300)	III Weak	Southern Leyte, Eastern Visayas	Philippines
56 km (35 mi) SE of epicenter	Surigao City (pop: 87,800)	III Weak	Province of Surigao del Norte, Caraga	Philippines
671 km (417 mi) NW 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
4.1	14 km (8.7 mi)	2023-08-30 11:07:00	Philippines: 005 Km S 19° W of Liloan (Southern Leyte)	PHIVOLCS (Philippine Institute of Volcanology and Seismology)
3.7	11 km (6.8 mi)	2023-08-30 11:07:38	Leyte, Philippines 2.5 km (1.5 mi) epicenter difference with PHIVOLCS	RaspberryShake (RaspberryShake)

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Seismograms

Seismic station: Davao, Philippines (DAV/IU network) | Distance from quake: 342 km / 213 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: 0.2-10.0 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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