Clear Lake volcan

champ volcanique 1439 m / 4,721 ft
California, USA, 38.97°N / -122.77°W
Condition actuelle: normal / en sommeil (1 sur 5)

Clear Lake champ volcanique se situe dans le nord de Coast Ranges, en Californie, ca. 135 km au nord de San Francisco. Le champ volcanique constitué de complexes dôme de lave, des cônes de scories et des maars du basaltiques à rhyolitiques-composition. Mont Konocti, un dôme de lave dacitique sur la rive sud du lac Clear, est le plus grand édifice volcanique.
La région a une intense activité gethermal, causée par une grande chambre magmatique est encore chaud silicique environ 14 km de large et 7 km sous la surface. Il fournit la source de chaleur pour les geysers, le plus grand du monde champ géothermique produisant sur le côté sud-ouest du champ volcanique. Ses centrales géothermiques peut générer environ 2000 mégawatts, soit suffisamment pour alimenter deux villes de la taille de San Francisco.
La dernière activité volcanique qui s'est passé il ya 10.000 ans et a formé maars et de cônes de cendres le long des rives du lac Clear, le lac d'eau douce naturelle Grandes, en Californie. Volcanisme autour du lac Clear est lié à la complexité du système faille de San Andreas transformer.

Montrer carte interactive
Style éruptif tipique: effusive (lava domes)
Eruptions du volcan Clear Lake: ca. 10,000 years ago

Latest nearby earthquakes

HeureMag. / ProfondeurDistance/Lieu
Wed, 23 Jun 2021 (GMT) (1 séisme)
23 Jun 2021 00:44:23 GMT
0.7

2.6 km
18 km (11 mi)
7km NW of The Geysers, CA
Tue, 22 Jun 2021 (GMT) (4 séismes)
22 Jun 2021 23:47:32 GMT
0.4

2.7 km
15 km (9.3 mi)
8km W of Cobb, CA
22 Jun 2021 23:43:57 GMT
0.4

1.6 km
21 km (13 mi)
2km E of The Geysers, CA
22 Jun 2021 22:57:27 GMT
0.7

1.4 km
16 km (9.9 mi)
4km W of Cobb, CA
22 Jun 2021 22:37:44 GMT
0.8

1.9 km
18 km (11 mi)
5km NW of The Geysers, CA

Introduction

Volcanic activity has been largely non-explosive, with the exception of one major explosive eruption that must have occurred and deposited a airfall tuff. Most lavas found here range from basalt through rhyolite in composition, dacite being the most dominant type.

Eruptions at Clear Lake volcanic field:
4 eruptive episodes separated by time gaps of ca. 150-200,000 years have been recognized: 2.1-1.3 million years ago (m.y.), 1.1-0.8 m.y., 0.65-0.30 m.y., and 100,000-10,000 years ago. The total volume of about 100 individual eruptions exceeds 70 cubic kilometers.
Eruptive products from the first activity episode are found in the east of the field. The second activity episode constructed Cobb Mountain (1 million years, Ma) and Mount Hannah (0.9 Ma). The third episode of activity was at the Mount Konocti–Thurston Lake area, the most voluminous dacite and rhyolite feature of the Clear Lake volcanics.
The most recent activity, up to about 10,000 years ago were small mostly basaltic and andesitic eruptions in the north of the field.

Sources: GVP, NCGS (Northern California Geological Society)


See also: Sentinel hub | Landsat 8
Montrer plus
Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version

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:
  • 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!
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.