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Light mag. 4.9 earthquake - Philippine Sea, 74 km north of Surigao City, Philippines, on Wednesday, Jan 20, 2021 at 2:53 pm (GMT +8)

Light mag. 4.9 earthquake - Philippine Sea, 74 km north of Surigao City, Philippines, on Wednesday, Jan 20, 2021 at 2:53 pm (GMT +8) Light mag. 4.9 earthquake - Philippine Sea, 74 km north of Surigao City, Philippines, on Wednesday, Jan 20, 2021 at 2:53 pm (GMT +8)

Light magnitude 4.9 earthquake at 100 km depth

20 Jan 07:09 UTC: First to report: EMSC after 16 minutes.
20 Jan 07:37: Magnitude recalculated from 4.2 to 4.9. Hypocenter depth recalculated from 39.0 to 95.0 km (from 24 to 59 mi). Epicenter location corrected by 24 km (15 mi) towards W.
20 Jan 07:56: Hypocenter depth recalculated from 95.0 to 100.0 km (from 59 to 62 mi).
20 Jan 08:29: Epicenter location corrected by 6.2 km (3.9 mi) towards SW.
Update Wed, 20 Jan 2021, 07:15

Light magnitude 4.2 quake hits 32 km northeast of Loreto, Philippines early afternoon

4.2 quake 20 Jan 2:53 pm (GMT +8)
4.2 quake 20 Jan 2:53 pm (GMT +8)
An earthquake of magnitude 4.2 occurred only 22 minutes ago 32 km northeast of Loreto, Philippines, the European-Mediterranean Seismological Centre (EMSC) reported.
The quake hit at a moderately shallow depth of 39 km beneath the epicenter near Loreto, Dinagat Islands, Caraga, early afternoon on Wednesday 20 January 2021 at 2:53 pm local time. 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.
A second report was later issued by the Philippine Institute of Volcanology and Seismology (PHIVOLCS), which listed it as a magnitude 4.2 earthquake as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Loreto (pop. 5,400) located 32 km from the epicenter, Loreto (pop. 5,400) 32 km away, Loreto (pop. 5,400) 32 km away, Loreto (pop. 5,400) 32 km away, Loreto (pop. 5,400) 32 km away, Sulangan (pop. 3,000) 45 km away, Guiuan (pop. 11,000) 57 km away, and Surigao City (pop. 87,800) 89 km away.

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Earthquake details

Date & timeJan 20, 2021 06:53:12 UTC
Local time at epicenterWednesday, Jan 20, 2021 at 2:53 pm (GMT +8)
StatusConfirmed
Magnitude4.9
Depth100.0 km
Epicenter latitude / longitude10.45°N / 125.55°E (Philippine Sea, Philippines)
Antipode10.45°S / 54.45°W
Shaking intensityWeak shaking
Felt2 reports
Primary data sourceEMSC (European-Mediterranean Seismological Centre)
Nearest volcanoCabalian (70 km / 43 mi)
Nearby towns and cities10 km (6 mi) NNW of Loreto (pop: 5,400) | Show on map | Quakes nearby
35 km (21 mi) ENE of Hinundayan (pop: 2,690) | Show on map | Quakes nearby
68 km (42 mi) ESE of Abuyog (Leyte) (pop: 15,600) | Show on map | Quakes nearby
74 km (46 mi) N of Surigao City (pop: 87,800) | Show on map | Quakes nearby
85 km (53 mi) ENE of Maasin (Southern Leyte) (pop: 18,300) | Show on map | Quakes nearby
86 km (53 mi) ESE of Baybay (Leyte) (pop: 17,700) | Show on map | Quakes nearby
94 km (58 mi) SE of Tanauan (Leyte) (pop: 16,600) | Show on map | Quakes nearby
100 km (62 mi) SE of Palo (Leyte) (pop: 17,500) | Show on map | Quakes nearby
106 km (66 mi) SE of Tacloban City (pop: 242,100) | Show on map | Quakes nearby
678 km (421 mi) SE of Manila (pop: 1,600,000) | Show on map | Quakes nearby
89 km (55 mi) ESE of Leyte Island (pop: 2,388,500) | Show on map | Quakes nearby
197 km (123 mi) E of Cebu Island (pop: 4,164,500) | Show on map | Quakes nearby
Weather at epicenter at time of quakeOvercast Clouds 28.1°C (83 F), humidity: 77%, wind: 1 m/s (2 kts) from S
Estimated seismic energy released1.4 x 1012 joules (392 megawatt hours, equivalent to 338 tons of TNT) | about seismic energy
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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.
Mag.DepthLocationSource
4.9100 kmLEYTE, PHILIPPINESEMSC
4.345 km033 Km S 13° E of Homonhon Island (Guiuan) (Eastern Samar), PhilippinesPHIVOLCS
4.988 km14 Km N of Loreto, PhilippinesUSGS

Seismograms

Seismic station: Davao, Philippines (DAV/IU network) | Distance from quake: 376 km / 234 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
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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.
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Cagayan de Oro City (240.4 km SSW of epicenter) [Map] / Very weak shaking (MMI II) : I felt weak shaking and my water was shaking weak (reported through our app)  
Siargao / Light shaking (MMI IV)

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