Quake info: Mag. 4.8 earthquake – South China Sea, 10.9 km south of Calaca, Province of Batangas, Calabarzon, Philippines, on Saturday, 16 Jan 2021 6:48 am (GMT +8)

Mag. 4.8 earthquake  - South China Sea, 10.9 km south of Calaca, Province of Batangas, Calabarzon, Philippines, on Saturday, 16 Jan 2021 6:48 am (GMT +8)

Light magnitude 4.8 earthquake at 185 km depth

15 Jan 23:00 UTC: First to report: GFZ after 11 minutes.

Update Fri, 15 Jan 2021, 23:06

Light magnitude 4.8 earthquake 11 km southwest of Calaca, Philippines

4.8 quake 16 Jan 6:48 am (GMT +8)

4.8 quake 16 Jan 6:48 am (GMT +8)

An earthquake of magnitude 4.8 occurred early morning on Saturday 16 January 2021 at 6:48 am local time near Calaca, Province of Batangas, Calabarzon, Philippines, as reported by the German Research Centre for Geosciences (GFZ).
According to preliminary data, the quake was located at an intermediate to considerable depth of 185 km. The strength of the earthquake may have been tempered by its relative great depth below the surface, which makes it feel weaker in absolute terms. 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.
Our monitoring service identified a second report from the Philippine Institute of Volcanology and Seismology (PHIVOLCS) which listed the quake at magnitude 4.5. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake at magnitude 4.5.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Hukay (pop. 2,200) located 8 km from the epicenter, Calaca (pop. 37,400) 11 km away, Balayan (pop. 50,100) 12 km away, Balayan (pop. 50,100) 12 km away, Calatagan (pop. 16,100) 16 km away, Taal (pop. 39,700) 16 km away, Bauan (pop. 33,600) 25 km away, Batangas City (pop. 237,400) 31 km away, Las Piñas (pop. 590,000) 71 km away, and Manila (pop. 1,600,000) 88 km away.
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.

If you were or still are in this area during the quake help others with your feedback and file a quick report here.

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Earthquake data:

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Date & time: 15 Jan 2021 22:48:57 UTC –
Local time at epicenter: Saturday, 16 Jan 2021 6:48 am (GMT +8)
Magnitude: 4.8
Depth: 185.0 km
Epicenter latitude / longitude: 13.84°N / 120.78°E (
South China Sea, Philippines)
Nearest volcano: Taal (29 km / 18 mi)
Nearby towns and cities:
8 km (5 mi) E of Hukay (pop: 2,230) –> See nearby quakes!
11 km (7 mi) SSW of Calaca (pop: 37,400) –> See nearby quakes!
12 km (7 mi) SSE of Balayan (Batangas) (pop: 50,100) –> See nearby quakes!
12 km (7 mi) SSE of Balayan (pop: 50,100) –> See nearby quakes!
16 km (10 mi) E of Calatagan (pop: 16,100) –> See nearby quakes!
16 km (10 mi) WSW of Taal (pop: 39,700) –> See nearby quakes!
25 km (16 mi) WNW of Bauan (Batangas) (pop: 33,600) –> See nearby quakes!
31 km (20 mi) WNW of Batangas City (pop: 237,400) –> See nearby quakes!
71 km (44 mi) SSW of Las Piñas (pop: 590,000) –> See nearby quakes!
88 km (55 mi) SSW of Manila (pop: 1,600,000) –> See nearby quakes!
30 km (19 mi) SW of Volcano Island –> See nearby quakes!

Weather at epicenter at time of quake:
Few Clouds 25°C (77 F), humidity: 83%, wind: 2 m/s (4 kts) from NNE

Primary data source: GFZ (German Research Centre for Geosciences)

Estimated released energy: 1 x 1012 joules (278 megawatt hours, equivalent to 239 tons of TNT) More info

If you felt this quake (or if you were near the epicenter), please share your experience and submit a short “I felt it” report! Other users would love to hear about it!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.

Magnitude Depth Location Source
M 4.8 185 km Mindoro, Philippines GFZ
M 4.6 168 km MINDORO, PHILIPPINES EMSC
M 4.8 153 km 005 Km N 74° W of Calatagan (Batangas), Philippines PHIVOLCS
M 4.6 159 km 4 Km SSE of Hukay, Philippines USGS


User reports for this quake (6)

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Honiara,Solomon Islands (5039.8 km ESE of epicenter) [Map] / Very weak shaking (MMI II) / 1-2 s : A small tremor and not last fo a long time

111.4 km NNE of epicenter [Map] / not felt (reported through our app)

Santa Rosa (53.4 km NNE of epicenter) [Map] / not felt (reported through our app)

38.9 km ENE of epicenter [Map] / not felt (reported through our app)

Lemery batangas / not felt

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Earlier earthquakes in the same area since 1900

Mag. 4.8 earthquake – South China Sea, 10.9 km south of Calaca, Province of Batangas, Calabarzon, Philippines, on Saturday, 16 Jan 2021 6:48 am (GMT +8)

Map of earlier quakes

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