Contact | RSS | EN | DE | EL | ES | FR | IT | RU

Griggs volcano

Updated: Nov 29, 2023 06:29 GMT -
Stratovolcano 2317 m / 7,602 ft
United States, Alaska Peninsula, 58.35°N / -155.09°W
Current status: normal or dormant (1 out of 5)

Show interactive Map
[hide map] [enlarge]
Typical eruption style: unspecified
Griggs volcano eruptions: 1790 BC ± 40 years

Latest nearby earthquakes

TimeMag. / DepthDistance/Location
Wednesday, November 29, 2023 GMT (1 quake)
Nov 28, 05:09 pm (Anchorage)
(Nov 29, 02:09 GMT)
1.8

0.4 km
23 km (14 mi)
111 mi west of Kodiak, Alaska, USA
Sunday, November 26, 2023 GMT (2 quakes)
Nov 26, 06:38 am (Anchorage)
(Nov 26, 14:38 GMT)
1.4

111 km
11 km (6.8 mi)
90 Km NNW of Karluk, Alaska
Nov 25, 09:45 pm (Anchorage)
(Nov 26, 06:45 GMT)
1.7

79 km
36 km (22 mi)
Alaska Peninsula
Wednesday, November 22, 2023 GMT (1 quake)
Nov 21, 04:32 pm (Anchorage)
(Nov 22, 00:32 GMT)
1.4

23 km
27 km (17 mi)
Alaska Peninsula
Tuesday, November 21, 2023 GMT (1 quake)
Nov 21, 12:07 am (Anchorage)
(Nov 21, 09:07 GMT)
2.5

3.7 km
12 km (7.5 mi)
98 mi west of Kodiak, Alaska, USA

Background

The summit of Mount Griggs towers above Knife Creek on the NE side of the Valley of Ten Thousand Smokes. The volcano is uniquely offset west of the NE-trending alignment of volcanoes in the Katmai area. The broad, 2317-m-high stratovolcano, formerly known as Knife Peak, consists of a late-Pleistocene volcano with glacial valleys on the north that was truncated on its SW side by an early Holocene edifice collapse. A Holocene volcano was subsequently constructed within the 1.5-km-wide scarp left by the emplacement of a large SW-flank debris avalanche. Nested cones with three concentric craters mostly fill the scarp, and thick, blocky lava flows blanket the SW flanks of the volcano below the collapse scarp. In contrast to the more silicic centers of the Katmai area along the crest of the range, lava flows from Griggs are dominantly andesitic in composition, and dacitic lava flows are uncommon. No historical eruptions have occurred from Griggs, but noisy fumarolic jets near the summit can be heard from the valley floor, 1750 m below.
---
Smithsonian / GVP volcano information


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

More on VolcanoDiscovery

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:
  • Design upgrade
  • 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!
Stop Russia's Agression - Support Ukraine
Significant parts of this website use brilliant open-source software developed by Ukrainians. Russia's unprovoked war has killed tens of thousands, displaced millions, and the beautiful country of Ukraine is being destroyed. We cannot be silent even if the topic of this website has nothing to do with politics.
If you like to support Ukraine from abroad:
Ukrainians recommend the Come Back Alive charity. For other options, see StandWithUkraine.
Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.
Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.
Volcanoes & Earthquakes
VolcanoDiscovery Home
Volcanoes | Earthquakes | Photos | Volcano News | App
Adventure & Study Travel
Tours to Volcanoes and Volcanic Areas: walking tours, photo tours, study tours
Tours & Dates | FAQ | About us
Get our newsletter!
Company info
Contact | Legal info | Terms & conditions
Follow us
Follow us on facebook Follow us on Instagram Follow us on Twitter Visit our Youtube channel
EN | DE | EL | ES | FR | IT | RU
VolcanoDiscovery GmbH, Germany, Reg. nr.: HRB 103744, EU Tax Id: DE 297 465 123 owned and created by
Dr. Tom Pfeiffer, volcanologist, volcano photographer, tour organizer member of
IAVCEI
Volcanological Society
Ecotourism Greece
Insured by R+V
VolcanoDiscovery © 2004- All Rights Reserved | Privacy - cookie settings