Stati Uniti · Stratovulcano
Pavlof Sister
- Tipo
- Stratovulcano
- Altitudine
- 2142 m
- Ultima eruzione
- Sconosciuto
- Tipo
- Stratovulcano
- Paese
- Stati Uniti
- Regione
- Nord America / Aleutian Ridge Volcanic Arc
- Altitudine
- 2142 m
- Coordinate
- 55.457, -161.854
- Ultima eruzione
- Sconosciuto
- Contesto tettonico
- Zona di subduzione / Crosta continentale (> 25 km)
- Forma vulcanica
- Composito
- Roccia principale
- Basalto / Picrobasalto
Sintesi geologica
Located near the western end of the Alaska Peninsula at the end of a chain of volcanoes trending NE from Emmons Lake caldera, the symmetrical Pavlof Sister stratovolcano is somewhat more eroded than Pavlof volcano to the SW. Pavlof Sister, along with Pavlof and Little Pavlof, formed outside of the Emmons Lake caldera; these and other volcanoes inside Emmons Lake caldera are not glaciated and thus would have formed since the area was last glaciated about 15-20,000 years ago. Pavlof Sister is almost 400 m lower than Pavlof and has a sharper-peaked summit. Some sources attributed a period of intermittent eruptive activity from 1762 to 1786 CE to Pavlof Sister, but other sources consider this event to have been from Pavlof.
Sintesi da Wikipedia
Riassunto in inglesePavlof Sister is a stratovolcano on the Alaska Peninsula. It is a satellite peak of Pavlof Volcano, lying directly northeast. The mountain was named by the USGS in 1929. It is considered dormant, as the volcano was reported to have last erupted between 1762 and 1786 although the event is questionable. The Alaska Volcano Observatory has the volcano alert level of Pavlof Sister set to "Unassigned", meaning the volcano is not currently monitored.
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