- South Pacific Ocean, 189 km southwest of Apia, Tuamasaga, Samoa, on 2015-08-06 22:17:39 -12:00

 - South Pacific Ocean, 189 km southwest of Apia, Tuamasaga, Samoa, on 2015-08-06 22:17:39 -12:00

Moderate magnitude 4.5 earthquake at 33 km depth

7 Aug 12:10 UTC: First to report: USGS after 1 hour and 52 minutes.
Date & time: 7 Aug 2015 10:17:39 UTC
Local time at epicenter: 2015-08-06 22:17:39 -12:00
Magnitude: 4.5
Depth: 32.7 km
Epicenter latitude / longitude: 15.1749°S / 172.8508°W (South Pacific Ocean, Samoa)
Nearest volcano: West Mata (97 km / 60 mi)
Nearby towns and cities:
168 km (105 mi) SSW of Vailoa (pop: 769) --> See nearby quakes!
173 km (108 mi) SSW of Mulifanua (pop: 4,510) --> See nearby quakes!
181 km (112 mi) SSW of Fasito‘outa (pop: 2,100) --> See nearby quakes!
186 km (115 mi) S of Asau (pop: 6,640) --> See nearby quakes!
189 km (118 mi) SW of Apia (pop: 40,400) --> See nearby quakes!
198 km (123 mi) SSW of Safotu (pop: 1,210) --> See nearby quakes!
198 km (123 mi) SW of Lufilufi (pop: 1,070) --> See nearby quakes!
252 km (156 mi) WSW of Pago Pago (Ma'Oputasi, American Samoa) (pop: 11,500) --> See nearby quakes!
416 km (258 mi) ESE of Mata-Utu (Hahake, Wallis & Futuna) (pop: 1,200) --> See nearby quakes!
532 km (331 mi) NW of Alofi (Niue) (pop: 624) --> See nearby quakes!
183 km (114 mi) SW of Upolu Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.5 x 1011 joules (98.6 megawatt hours, equivalent to 84.8 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!
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 4.533 km- 129km NE of Hihifo, TongaUSGS
M 4.533 km SAMOA ISLANDS REGIONEMSC

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

Earlier earthquakes in the same area

- South Pacific Ocean, 189 km southwest of Apia, Tuamasaga, Samoa, on 2015-08-06 22:17:39 -12:00
Volcanoes & Earthquakes - new app for Android
Why is there advertising on this site?

Support us - Help us upgrade our server!

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.
Our server is reaching its limits and we need financing to increase capacity in order to deal with huge activity peaks when quakes occur. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every penny counts and every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features and in upgrading our software, please make a donation (PayPal or Online cc 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! With best regards from the VolcanoDiscovery team.
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.