Get our newsletter!
Check out our volcano tours on VolcanoAdventures.com!
Volcanoes & Earthquakes - new app for Android
Guaranteed tours
8-16 May 2021: From Stromboli to Etna - Sicila and Eolian Islands (Italy)
: spaces available / : guaranteed / : few spaces left / : booked out
Interactive map of latest earthquakes and active volcanoes in the world

Major mag. 7.2 earthquake - Samar, Philippines on Friday, 31 October 1975

Major mag. 7.2 earthquake  - Samar, Philippines on Friday, 31 October 1975
Date & time: Friday, 31 October 1975 08:28 UTC
Magnitude: 7.2
Depth: 50.0 km
Epicenter latitude / longitude: 12.54°N / 125.993°E (Philippines)
Nearest volcano: Biliran (195 km / 121 mi)
Nearby towns and cities:
66 km (41 mi) NE of Alugan (pop: 2,100)
66 km (41 mi) NE of San Policarpo (pop: 3,600)
71 km (44 mi) NE of Arteche (pop: 5,000)
147 km (92 mi) NE of Catbalogan (pop: 68,100)
179 km (111 mi) NE of Panalanoy (pop: 189,100)
180 km (112 mi) NE of Tacloban (pop: 242,100)
Primary data source: USGS
Estimated released energy: 4 x 1015 joules (1106 gigawatt hours, equivalent to 9.5 x 105 tons of TNT or 59.5 atomic bombs!) [learn more]
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.
TimeMag. / DepthLocationSource
Fri, 31 Oct 08:28 UTCM 7.2 / 50 kmSamar, PhilippinesUSGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

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 yet. If you felt it be the first to report it!

Aftershocks of the 7.2 quake: Samar, Philippines, 31 Oct 1975 08:28

More info
Recorded aftershocks, latest first (128 quakes):
  • 15 Aug 1977 19:02 UTC
    | M 5.1 |
    33 km (20.5 mi) depth
    |
    166 km (103 mi) distance
    | USGS | Details
  • 01 Aug 1977 01:18 UTC
    | M 5.0 |
    55 km (34.2 mi) depth
    |
    81 km (50 mi) distance
    | USGS | Details
  • 06 Jul 1977 20:57 UTC
    | M 5.1 |
    14 km (8.7 mi) depth
    |
    130 km (81 mi) distance
    | USGS | Details
  • 20 Jun 1977 19:53 UTC
    | M 4.6 |
    33 km (20.5 mi) depth
    |
    50 km (31 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13904 km (8640 mi) distance
    | | Details
  • 14 Jun 1977 07:51 UTC
    | M 5.1 |
    49 km (30.4 mi) depth
    |
    170 km (106 mi) distance
    | USGS | Details
  • 13 Jun 1977 11:47 UTC
    | M 5.6 |
    35 km (21.7 mi) depth
    |
    169 km (105 mi) distance
    | USGS | Details
  • 02 May 1977 02:25 UTC
    | M 5.3 |
    26 km (16.2 mi) depth
    |
    132 km (82 mi) distance
    | USGS | Details
  • 25 Apr 1977 14:45 UTC
    | M 4.7 |
    225 km (139.8 mi) depth
    |
    56 km (35 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13904 km (8640 mi) distance
    | | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13904 km (8640 mi) distance
    | | Details
  • 10 Apr 1977 04:21 UTC
    | M 5.3 |
    33 km (20.5 mi) depth
    |
    49 km (30 mi) distance
    | USGS | Details
  • 02 Apr 1977 06:35 UTC
    | M 5.1 |
    33 km (20.5 mi) depth
    |
    79 km (49 mi) distance
    | USGS | Details
  • 17 Mar 1977 13:40 UTC
    | M 4.6 |
    33 km (20.5 mi) depth
    |
    38 km (24 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13904 km (8640 mi) distance
    | | Details
  • 28 Feb 1977 20:43 UTC
    | M 4.6 |
    33 km (20.5 mi) depth
    |
    165 km (102 mi) distance
    | USGS | Details
  • Show all

Earlier earthquakes in the same area

Major mag. 7.2 earthquake - Samar, Philippines on Friday, 31 October 1975
 

More on VolcanoDiscovery

 
Why is there advertising on this site?

Support us!

Maintaining the website and our free apps is a time- and cost-intensive effort.
If you find the information useful and would like to support our team to develop further features and get the upgraded ad-free version, consider making a donation (PayPal or Online cc payment).
Planned features:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
Thanks to your past donations, these features have been added recently:
  • Earthquake archive back to 1900
  • Additional 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.