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Light mag. 4.1 earthquake - South China Sea, 50 km northwest of Laoag, Province of Ilocos Norte, Philippines, on Friday, Mar 17, 2023 at 10:16 pm (GMT +8) -

Light mag. 4.1 earthquake - South China Sea, 50 km northwest of Laoag, Province of Ilocos Norte, Philippines, on Friday, Mar 17, 2023 at 10:16 pm (GMT +8) Light mag. 4.1 earthquake - South China Sea, 50 km northwest of Laoag, Province of Ilocos Norte, Philippines, on Friday, Mar 17, 2023 at 10:16 pm (GMT +8)

Light magnitude 4.1 earthquake at 19 km depth

17 Mar 14:30 UTC: First to report: PHIVOLCS after 15 minutes.

Earthquake details

Date & timeMar 17, 2023 14:16:00 UTC -
Local time at epicenterFriday, Mar 17, 2023 at 10:16 pm (GMT +8)
Depth19.0 km
Epicenter latitude / longitude18.49°N / 120.24°E (South China Sea, Philippines)
Antipode18.49°S / 59.76°W
Shaking intensityLight shaking
Felt2 reports
Primary data sourcePHIVOLCS (Philippine Institute of Volcanology and Seismology)
Nearest volcanoAmbalatungan (159 km / 99 mi)
Nearby towns and cities36 km (22 mi) W of Davila (pop: 3,470) | Show on map | Quakes nearby
44 km (27 mi) WNW of Pasuquin (Ilocos Norte) (pop: 5,770) | Show on map | Quakes nearby
50 km (31 mi) NW of Laoag (pop: 102,100) | Show on map | Quakes nearby
52 km (32 mi) NW of San Nicolas de Ilocos (Ilocos Norte) (pop: 34,200) | Show on map | Quakes nearby
58 km (36 mi) W of Pagudpud (pop: 4,950) | Show on map | Quakes nearby
59 km (37 mi) NW of Batac City (pop: 53,500) | Show on map | Quakes nearby
65 km (40 mi) NW of Dingras (Ilocos Norte) (pop: 6,870) | Show on map | Quakes nearby
439 km (273 mi) N of Manila (pop: 1,600,000) | Show on map | Quakes nearby
Weather at epicenter at time of quakeScattered Clouds 25.8°C (79 F), humidity: 82%, wind: 5 m/s (9 kts) from ENE
Estimated seismic energy released8.9 x 1010 joules (24.8 megawatt hours, equivalent to 21.3 tons of TNT) | about seismic energy
Show interactive Map
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Data for the same earthquake reported by different agencies

Info: 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.
4.119 kmPhilippines: 043 Km S 87° W of Burgos (Ilocos Norte)PHIVOLCS
4.119 kmLuzon, PhilippinesRaspberryShake


Seismic station: Taitung (TWGB/TW network) | Distance from quake: 489 km / 304 mi | Show on map | Station Info
Seismic station Taitung: 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
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User reports for this quake (2)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Laoag, Ilocos Norte, Ilocos (49.7 km SE of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 10-15 s
LAOAG CITY (Capital) / Light shaking (MMI IV) / simple rolling (tilting sideways along one direction) / 5-10 s

Earlier earthquakes in the same area

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