Very strong mag. 6.8 earthquake - Mindanao Sea, 17 km southeast of Olutanga Island, Philippines, on Tuesday, 17 August 1976 at 04:19 (GMT)

Very strong mag. 6.8 earthquake - Mindanao Sea, 17 km southeast of Olutanga Island, Philippines, on Tuesday, 17 August 1976 at 04:19 (GMT)

Very strong magnitude 6.8 earthquake at 22 km depth

Date & time: 17 Aug 1976 04:19:27 UTC
Magnitude: 6.8
Depth: 22.0 km
Epicenter latitude / longitude: 7.249°N / 122.939°E (Mindanao Sea, Philippines)
Nearest volcano: Kaladis (37 km / 23 mi)
Nearby towns and cities:
12 km (8 mi) ESE of Olutanga (pop: 7,130) --> See nearby quakes!
71 km (44 mi) SE of Ipil (Zamboanga Sibugay) (pop: 19,200) --> See nearby quakes!
84 km (52 mi) SW of Pagadian (pop: 186,900) --> See nearby quakes!
88 km (54 mi) SW of Muricay (pop: 132,100) --> See nearby quakes!
103 km (64 mi) ENE of Zamboanga City (pop: 457,600) --> See nearby quakes!
113 km (70 mi) ENE of Recodo (pop: 42,800) --> See nearby quakes!
123 km (76 mi) ENE of Isabela (pop: 67,300) --> See nearby quakes!
141 km (88 mi) SW of Ozamiz (pop: 93,100) --> See nearby quakes!
144 km (90 mi) W of Cotabato City (pop: 179,400) --> See nearby quakes!
846 km (525 mi) SSE of Manila (pop: 1,600,000) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1 x 1015 joules (278 gigawatt hours, equivalent to 2.4 x 105 tons of TNT or 14.9 atomic bombs!) 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!
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.
MagnitudeDepthLocationSource
M 6.822 kmMindanao, 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!
Volcanoes & Earthquakes - new app for Android

Aftershocks

More info
Recorded aftershocks, latest first (52 quakes):
  • 22 Nov 1976 04:22 UTC
    | M 6.0 |
    60 km (37.3 mi) depth
    |
    75 km (46 mi) distance
    | USGS | Strong mag. 6.0 earthquake - Mindanao Sea, 77 km west of Cotabato City, Philippines, on Monday, 22 November 1976 at 04:22 (GMT)
  • 07 Nov 1976 01:24 UTC
    | M 4.8 |
    29 km (18 mi) depth
    |
    61 km (38 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13641 km (8476 mi) distance
    | | Details
  • 01 Nov 1976 20:25 UTC
    | M 4.9 |
    48 km (29.8 mi) depth
    |
    78 km (48 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13641 km (8476 mi) distance
    | | Details
  • 22 Oct 1976 14:51 UTC
    | M 5.6 |
    33 km (20.5 mi) depth
    |
    59 km (37 mi) distance
    | USGS | Details
  • 07 Oct 1976 08:31 UTC
    | M 5.1 |
    14 km (8.7 mi) depth
    |
    58 km (36 mi) distance
    | USGS | Details
  • 30 Sep 1976 07:14 UTC
    | M 4.6 |
    33 km (20.5 mi) depth
    |
    93 km (58 mi) distance
    | USGS | Details
  • 29 Sep 1976 10:35 UTC
    | M 4.2 |
    60 km (37.3 mi) depth
    |
    72 km (45 mi) distance
    | USGS | Details
  • 25 Sep 1976 03:50 UTC
    | M 5.2 |
    33 km (20.5 mi) depth
    |
    104 km (64 mi) distance
    | USGS | Details
  • 25 Sep 1976 03:30 UTC
    | M 5.7 |
    45 km (28 mi) depth
    |
    107 km (67 mi) distance
    | USGS | Details
  • 22 Sep 1976 12:00 UTC
    | M 4.5 |
    33 km (20.5 mi) depth
    |
    106 km (66 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13641 km (8476 mi) distance
    | | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13641 km (8476 mi) distance
    | | Details
  • 17 Sep 1976 06:08 UTC
    | M 4.9 |
    58 km (36 mi) depth
    |
    70 km (43 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13641 km (8476 mi) distance
    | | Details
  • Show all

Earlier earthquakes in the same area

Volcanoes & Earthquakes - new app for Android
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:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Additional seismic data sources
  • Improved content in English
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.