Mount Hood volcano (Oregon, USA): earthquake M 3.9

Tue, 8 Jun 2021, 16:10
16:10 PM | BY: MARTIN
Earthquakes from 5 June shown with red circles, yellow triangles are seismic stations (image: CVO)
Earthquakes from 5 June shown with red circles, yellow triangles are seismic stations (image: CVO)
On 5 June at 20:51 local time, the Cascade Volcano Observatory's (CVO) seismic network detected a volcano-tectonic earthquake with magnitude M 3.9 that occurred about 4 km south of the summit at 4.3 km depth.
It was preceded by several earthquakes in the hour prior to the M 3.9, and tens of aftershocks have occurred so far with event rates declining in a manner typical of mainshock-aftershock sequences. The earthquake was felt in the vicinity around the volcano.
The mainshock characteristics and location are consistent with past swarms in the Mount Hood area, including a M 4.5 on June 29, 2002, that was located ~1 mile east of the M 3.9. Aftershocks will likely continue for hours or days, some of which may be felt.
Seismologists from the CVO and Pacific Northwest Seismic Network don't indicate that the seicmic event could be related to volcanic hazard at the volcano.
Source: Cascade Volcano Observatory volcano activity update 8 June 2021

Previous news

Show more
Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version

More on VolcanoDiscovery

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.