San Miguel volcano news & activity updates

San Miguel (Chaparrastique) volcano (El Salvador): increasing activity

jeu., 7 juin 2018, 07:35
07:35 AM | AUTEUR : T
Gas plume with diffuse ash from San Miguel volcano last week
Gas plume with diffuse ash from San Miguel volcano last week
Nr of daily earthquakes under the volcano (image: MARN)
Nr of daily earthquakes under the volcano (image: MARN)
During the past 2 weeks, the activity at the volcano has been increasing. Visibly, the volcano has been emitting a diffuse gas plume, sometimes containing some ash.
Since 22 May, MARN reports that there has been a significant increase in the number of earthquakes under the summit crater, with predominance of low and high frequency shallow earthquakes located mostly under the active crater. Earthquakes were mostly at magnitudes less than 1.5 and cannot be felt by people.

MARN interprets them as related to sudden and periodic pressure changes in the fluids of the shallow hydrothermal system. This increases the possibility of new ash emissions similar to the sporadic activity observed in recent years. It is less likely (but not impossible) that there is new lava arriving in the summit crater, which could lead up to a potentially more intense eruptive phase.

Thanks to reader Leonardo Torres, who brought this to our attention.

Actualités précédentes

mar., 9 mai 2017, 12:05
During 28 April-5 May seismic and degassing activity decreased at the volcano. ... Read all
Montrer plus
Découvrez notre app gratuite !
Volcanoes & Earthquakes - new app for Android
Android | Version iOS

Plus sur 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:
  • 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!
Copyright: VolcanoDiscovery ou autres sources indiquées.
Utilisation des documents: Les textes, les images et les vidéos de ce site internet sont protégées par copyright. Toute reproduction et tout usage sans accord préalable ne sont pas autorisés. Si vous désirez acquérir pour certains documents (photos, vidéos, textes ou autres) le droit de reproduction, d'édition et, plus généralement, de toute utilisation destinée à un usage public, qu'elle soit commerciale ou pas, vous êtes priés de nous contacter.