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Ukinrek Maars ηφαίστειο

Τελευταία ανανενώση: 29 Νοεμβρίου 2022 15:50 GMT -
Maars 91 m / 299 ft
United States, Alaska Peninsula, 57.83°N / -156.51°W
Current status: normal or dormant (1 out of 5)
Last update: 22 Dec 2021 (Smithsonian / USGS Weekly Volcanic Activity Report)

Διαδραστικός χάρτης
Typical eruption style: δεν έχει καθοριστεί
Ukinrek Maars ηφαίστειο εκρήξεις: 1977 

Latest nearby earthquakes

ΏραMag. / ΒάθοςΑπόσταση/Τοποθεσία
Τετάρτη, 23 Νοεμβρίου 2022 GMT (1 σεισμός)
22 Νοε 2022 19:51 (GMT -9) (23 Νοε 2022 04:51 GMT)
3.1

131 km
14 km (8.7 mi)
176 km νοτιοανατολικά από Dillingham, Αλάσκα, Ηνωμένες Πολιτείες
Δευτέρα, 21 Νοεμβρίου 2022 GMT (1 σεισμός)
21 Νοε 2022 04:07 (GMT -9) (21 Νοε 2022 13:07 GMT)
1.6

106 km
31 km (19 mi)
82 Km ENE of Ugashik, Alaska
Κυριακή, 20 Νοεμβρίου 2022 GMT (1 σεισμός)
20 Νοε 2022 08:03 (GMT -9) (20 Νοε 2022 17:03 GMT)
1.3

6.4 km
31 km (19 mi)
62 Km E of Ugashik, Alaska
Παρασκευή, 18 Νοεμβρίου 2022 GMT (1 σεισμός)
18 Νοε 2022 12:28 (GMT -9) (18 Νοε 2022 21:28 GMT)
3.5

4.9 km
22 km (14 mi)
210 km νοτιοανατολικά από Dillingham, Αλάσκα, Ηνωμένες Πολιτείες
Τρίτη, 15 Νοεμβρίου 2022 GMT (1 σεισμός)
15 Νοε 2022 09:33 (GMT -9) (15 Νοε 2022 18:33 GMT)
1.6

5 km
26 km (16 mi)
85 Km ENE of Ugashik, Alaska

Background

Ukinrek Maars are two explosion craters that were created in an area without previous volcanic activity during a 10-day-long phreatomagmatic eruption March-April 1977. The basaltic maars were erupted through glacial deposits in the Bering Sea lowlands 1.5 km south of Becharof Lake and 12 km west of Peulik volcano; their location is related to the regional Bruin Bay fault. The elliptical West Maar, which was the first to form, is 105 x 170 m wide and 35 m deep. The other maar, 600 m to the east, is 300 m wide and 70 m deep. Both maars are now filled by crater lakes; the eastern lake encircles a 49-m-high lava dome that was emplaced at the end of the eruption. Base surges were directed primarily to the NW. Juvenile material from the Ukinrek eruptions was of mantle-derived olivine basaltic composition. The dacitic Gas Rocks lava domes, of Quaternary age, are located on the shores of Becharof Lake, 3 km north of Ukinrek maars and were the site of a phreatic eruption about 2300 years ago.
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Smithsonian / GVP volcano information


See also: Sentinel hub | Landsat 8 | NASA FIRMS
Wed, 12 May 2021, 06:00

Ukinrek Maars volcano (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 12 May-18 May 2021 (Continuing Activity)

On 12 May AVO changed the Aviation Color Code and Volcano Alert Level for Ukinrek-Maars to Green and Normal, respectively, reflecting that communication with seismic stations had been re-established, allowing for the location of earthquakes and detection of unrest. ... Read all
Wed, 14 Apr 2021, 06:00

Ukinrek Maars volcano (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 14 April-20 April 2021 (Continuing Activity)

AVO reported a loss of operation and communication with seismic stations that monitor Ukinrek-Maars, likely caused by snow cover. Both the Aviation Color Code and the Volcano Alert Level were changed to Unassigned on 19 April, reflecting the inability to locate earthquakes to detect unrest. Monitoring will continue with the remaining seismic stations, regional infrasound networks, lightning detection, and satellite images. ... Read all
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