Light mag. 4.0 earthquake - 22 km east of Masbate, Bicol, Philippines, on 21 August 2020 - 01:25 AM (PST) -

This quake was likely an aftershock of the 6.6 quake Philippine Sea, 5.4 km east of Cataingan, Philippines, Aug 18, 2020 12:03 am (GMT +0), which had occurred 3 days earlier.
Light mag. 4.0 earthquake - 22 km east of Masbate, Bicol, Philippines, on 21 August 2020 - 01:25 AM (PST)

Light magnitude 4.0 earthquake at 16 km depth

20 Aug 17:50 UTC: First to report: PHIVOLCS after 25 minutes.
Hypocenter depth recalculated from 18.0 to 16.0 km.
Date & time: Aug 20, 2020 17:25:00 UTC -
Local time at epicenter: 21 August 2020 - 01:25 AM (PST)
Magnitude: 4
Depth: 16.0 km
Epicenter latitude / longitude: 12.32°N / 123.82°E (Philippine Sea, Philippines)
Antipode: 12.32°S / 56.18°W
Nearest volcano: Bulusan (56 km / 35 mi)
Nearby towns and cities:
9 km (6 mi) N of Miaga (pop: 2,150) --> See nearby quakes!
19 km (12 mi) SSE of San Fernando (Masbate) (pop: 6,210) --> See nearby quakes!
22 km (14 mi) ESE of Masbate (pop: 47,500) --> See nearby quakes!
22 km (14 mi) NNW of Palanas (pop: 2,690) --> See nearby quakes!
36 km (22 mi) ENE of Milagros (Lalawigan ng Masbate) (pop: 6,010) --> See nearby quakes!
40 km (25 mi) S of Bulan (Sorsogon) (pop: 28,500) --> See nearby quakes!
40 km (25 mi) NNW of Cataingan (Masbate) (pop: 7,810) --> See nearby quakes!
42 km (26 mi) SW of Matnog (Sorsogon) (pop: 6,720) --> See nearby quakes!
48 km (30 mi) SSW of Irosin (pop: 20,700) --> See nearby quakes!
398 km (248 mi) SE of Manila (pop: 1,600,000) --> See nearby quakes!
18 km (11 mi) NE of Masbate Island (pop: 706,900) --> See nearby quakes!
194 km (121 mi) NE of Panay Island (pop: 4,307,000) --> See nearby quakes!
Primary data source: PHIVOLCS (Philippine Institute of Volcanology and Seismology)
Estimated released energy: 6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) More info
Show interactive Map
[smaller] [bigger]
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!
If you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable to earthquake science, seismic 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.
4.016 km011 km N 17° E of Uson (Masbate) (Philippines)PHIVOLCS
4.018 kmMasbate Region, PhilippinesEMSC

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.
Volcanoes & Earthquakes - new app for Android

Earlier earthquakes in the same area

Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version
Why is there advertising on this site?
Support us - Help us upgrade our services!
We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.