SVERT reported that a weak thermal anomaly over Snow, a volcano of Chirpoi, was detected in satellite images on 24 and 26 April.

24 April 2013            Back to Top

SVERT reported that a weak thermal anomaly over Snow, a volcano of Chirpoi, was detected in satellite images on 24 and 26 April.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

10 April 2013            Back to Top

SVERT reported that a weak thermal anomaly over Snow, a volcano of Chirpoi, was detected in satellite images during 12-13 April; cloud cover prevented observations of the volcano on other days during 8-15 April.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

3 April 2013            Back to Top

SVERT reported that a weak thermal anomaly over Snow, a volcano of Chirpoi, was detected in satellite images on 6 April; cloud cover prevented observations of the volcano on other days during 1-8 April.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

13 March 2013            Back to Top

SVERT reported that a weak thermal anomaly over Snow, a volcano of Chirpoi, was detected in satellite images on 14 March; cloud cover prevented observations of the volcano on other days during 11-18 March.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

6 March 2013            Back to Top

SVERT reported that steam-and-gas emissions from Snow, a volcano of Chirpoi, were detected in satellite images on 5 March; cloud cover prevented observations of the volcano on other days during 4-11 March.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

27 February 2013            Back to Top

SVERT reported that weak steam-and-gas emissions from Snow, a volcano of Chirpoi, were observed on 25 February, and 1 and 3 March. A thermal anomaly was detected in satellite images on 28 February and 3 March. Cloud cover prevented observations of the volcano on other days during 25 February-4 March. The Aviation Color Code was Yellow.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

20 February 2013            Back to Top

SVERT reported that a thermal anomaly and weak steam-and-gas emissions from Snow, a volcano of Chirpoi, were detected in satellite images during 19 and 22-23 February; cloud cover prevented observations of the volcano on other days during 18-25 February. The Aviation Color Code was Yellow.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

13 February 2013            Back to Top

SVERT reported that a thermal anomaly and weak steam-and-gas emissions from Snow, a volcano of Chirpoi, were detected in satellite images during 14-15 February; cloud cover prevented observations of the volcano on other days during 11-18 February. The Aviation Color Code was Yellow.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

6 February 2013            Back to Top

SVERT reported that a thermal anomaly and steam-and-gas emissions from Snow, a volcano of Chirpoi, were detected in satellite images on 7 and 10 February; cloud cover prevented observations of the volcano on other days during 4-11 February.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

30 January 2013            Back to Top

SVERT reported that steam-and-gas emissions from Snow, a volcano of Chirpoi, were detected in satellite images on 1 February; cloud cover prevented observations of the volcano on other days during 28 January-4 February.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

23 January 2013            Back to Top

SVERT reported that a thermal anomaly and steam-and-gas emissions from Snow, a volcano of Chirpoi, on 8 January, were detected on 21, 23, and 25 January; cloud cover prevented observations of the volcano on other days during 22-28 January.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

9 January 2013            Back to Top

SVERT reported that a thermal anomaly was detected over Snow, a volcano of Chirpoi, on 8 January, and steam-and-gas plumes were detected on 9 and 11 January; cloud cover prevented observations of the volcano on other days during 7-14 January.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

2 January 2013            Back to Top

SVERT reported that a thermal anomaly was detected over Snow, a volcano of Chirpoi, during 5-6 January; cloud cover prevented observations of the volcano on other days during 1-7 January.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

26 December 2012            Back to Top

SVERT reported that a thermal anomaly was detected over Snow, a volcano of Chirpoi, during 24-25, 28, and 30 December; cloud cover prevented observations of the volcano on other days during 24-31 December.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

19 December 2012            Back to Top

SVERT reported that a thermal anomaly was detected over Snow, a volcano of Chirpoi, during 17, 19, and 21-22 December. A steam-and-gas plume was observed on 19 December. Cloud cover prevented observations of the volcano on the other days during 10-17 December.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

12 December 2012            Back to Top

SVERT reported that a thermal anomaly was detected over Snow, a volcano of Chirpoi, during 11 and 13-15 December. A steam-and-gas plume was observed on 15 December. Cloud cover prevented observations of the volcano on other days during 10-17 December.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

5 December 2012            Back to Top

SVERT reported that a thermal anomaly was detected over Snow, a volcano of Chirpoi, during 3-4, 6, and 8 December; cloud cover prevented observations of the volcano on other days during 2-10 December.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

28 November 2012            Back to Top

SVERT reported that a thermal anomaly was detected over Snow, a volcano of Chirpoi, during 26-28 November; cloud cover prevented observations of the volcano on other days during 29 November-2 December.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

21 November 2012            Back to Top

SVERT reported that a thermal anomaly was detected over Snow, a volcano of Chirpoi, on 20, 22, and 25 November, possibly indicating a lava flow on the SE flank.

Sources: Sakhalin Volcanic Eruption Response Team (SVERT)

Below is a summary of eruption dates and Volcanic Explosivity Indices (VEI).

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Erlich E N, 1986. Geology of the calderas of Kamchatka and Kurile Islands with comparison to calderas of Japan and the Aleutians, Alaska. {U S Geol Surv Open-File Rpt}, 86-291: 1-300

Gorshkov G S, 1958. Kurile Islands. {Catalog of Active Volcanoes of the World and Solfatara Fields}, Rome: IAVCEI, 7: 1-99

Gorshkov G S, 1970. {Volcanism and the Upper Mantle; Investigations in the Kurile Island Arc}. New York: Plenum Publishing Corp, 385 p

Chirpoi, a small island lying between the larger islands of Simushir and Urup, contains a half dozen volcanic edifices constructed within an 8-9 km wide, partially submerged caldera. The southern rim of the caldera is exposed on nearby Brat Chirpoev Island. Two volcanoes on Chirpoi Island have been historically active. The symmetrical Cherny volcano, which forms the 691 m high point of the island, erupted twice during the 18th and 19th centuries. The youngest volcano, Snow, originated between 1770 and 1810. It is composed almost entirely of lava flows, many of which have reached the sea on the southern coast. No historical eruptions are known from 742-m-high Brat Chirpoev, but its youthful morphology suggests recent strombolian activity.