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Moderate mag. 4.8 earthquake - Halmahera Sea, 33 km northwest of Sorong, West Papua, Indonesia, on Saturday, Feb 20, 2021 at 7:04 pm (GMT +9)

Moderate mag. 4.8 earthquake - Halmahera Sea, 33 km northwest of Sorong, West Papua, Indonesia, on Saturday, Feb 20, 2021 at 7:04 pm (GMT +9) Moderate mag. 4.8 earthquake - Halmahera Sea, 33 km northwest of Sorong, West Papua, Indonesia, on Saturday, Feb 20, 2021 at 7:04 pm (GMT +9)

Moderate magnitude 4.8 earthquake at 10 km depth

20 Feb 10:11 UTC: First to report: EMSC after 7 minutes.
20 Feb 10:15: Now using data updates from BMKG
Update Sat, 20 Feb 2021, 10:15

Moderate magnitude 4.8 quake hits 34 km northwest of Sorong, Indonesia early evening

4.8 quake 20 Feb 7:04 pm (GMT +9)
4.8 quake 20 Feb 7:04 pm (GMT +9)
An earthquake of magnitude 4.8 occurred early evening on Saturday 20 February 2021 at 7:04 pm local time near Sorong, West Papua, Indonesia, as reported by the European-Mediterranean Seismological Centre (EMSC).
According to preliminary data, the quake was located at a shallow depth of 10 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Sorong (pop. 125,500) located 34 km from the epicenter.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Earthquake details

Date & timeFeb 20, 2021 10:04:34 UTC
Local time at epicenterSaturday, Feb 20, 2021 at 7:04 pm (GMT +9)
Depth10.0 km
Epicenter latitude / longitude0.66°S / 131.06°E (Halmahera Sea, Indonesia)
Antipode0.66°N / 48.94°W
Shaking intensityLight shaking
Felt2 reports
Primary data sourceBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)
Nearby towns and cities33 km (21 mi) NW of Sorong (pop: 125,500) | Show on map | Quakes nearby
335 km (208 mi) W of Manokwari (pop: 53,200) | Show on map | Quakes nearby
363 km (226 mi) NNW of Mas (pop: 320) | Show on map | Quakes nearby
381 km (237 mi) NE of Amahai (pop: 47,700) | Show on map | Quakes nearby
419 km (261 mi) ESE of Sofifi (Kota Tidore Kepulauan) (pop: 36,200) | Show on map | Quakes nearby
431 km (268 mi) SE of Tobelo (Kabupaten Halmahera Utara) (pop: 10,000) | Show on map | Quakes nearby
465 km (289 mi) NE of Ambon City (pop: 355,600) | Show on map | Quakes nearby
Weather at epicenter at time of quakeModerate Rain 29.2°C (85 F), humidity: 72%, wind: 4 m/s (7 kts) from W
Estimated seismic energy released1 x 1012 joules (278 megawatt hours, equivalent to 239 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.
4.610 kmIrian Jaya Region, IndonesiaEMSC
4.610 km28 Km WNW of Sorong, IndonesiaUSGS
4.710 kmIrian Jaya Region, IndonesiaGFZ


Seismic station: Davao, Philippines (DAV/IU network) | Distance from quake: 1053 km / 654 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. Source: IRIS Buffer of Uniform Data (BUD) webtool
Show more

User reports for this quake (2)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Sawinggrai village, Gam Island, Raja Ampat (55.1 km WNW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s
Sorong City / Weak shaking (MMI III) / horizontal (sideways) swinging / 20-30 s

Earlier earthquakes in the same area

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