Azufral volcano

Updated: Jul 6, 2022 22:17 GMT - Refresh
stratovolcano 4070 m / 13,353 ft
Colombia, 1.08°N / -77.68°W
Current status: normal or dormant (1 out of 5)

Azufral volcano (Azufral de Túquerres) is a stratovolcano in southern Colombia with a 2.5x3 km wide caldera 35 km SW of Galeras volcano. The last eruption took place about 1000 years ago.

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Typical eruption style: explosive
Azufral volcano eruptions: 930 BC (?), 1650 BC ± 150, 1850 BC (?), 2095 BC ± 100
Lastest nearby earthquakes:
TimeMag. / DepthDistance/Location
Tuesday, July 5, 2022 GMT (1 quake)
Jul 5, 2022 1:00 am (GMT -5) (Jul 5, 2022 06:00 GMT)
3.5

5 km
39 km (24 mi)
Departamento de Nariño, Colombia, 26 km west of Tulcan, Ecuador
Wednesday, June 29, 2022 GMT (1 quake)
Jun 29, 2022 1:06 pm (GMT -5) (Jun 29, 2022 18:06 GMT)
3.6

1 km
42 km (26 mi)
25 km west of Tulcan, Provincia del Carchi, Ecuador
Tuesday, June 28, 2022 GMT (1 quake)
Jun 28, 2022 6:34 pm (GMT -5) (Jun 28, 2022 23:34 GMT)
2.2

5 km
43 km (27 mi)
22 km west of Tulcan, Provincia del Carchi, Ecuador
Friday, June 24, 2022 GMT (2 quakes)
Jun 24, 2022 10:14 am (GMT -5) (Jun 24, 2022 15:14 GMT)
3.8
42 km (26 mi)
26 km west of Tulcan, Provincia del Carchi, Ecuador
Jun 24, 2022 3:41 am (GMT -5) (Jun 24, 2022 08:41 GMT)
3.5
43 km (27 mi)
25 km west of Tulcan, Provincia del Carchi, Ecuador

Background

Azufral's caldera contains a complex of several Holocene rhyodacitic lava-domes.
The crescent-shaped Laguna Verde lake occupies the NW side of the caldera. Laguna Verde is an acid lake (pH 2.4)) with hot springs on the NE shore of the lake (temperatures of 54°C, pH of 2.6, measured in 1990).
The latest lava dome in the caldera was formed about 3600 years ago and still has active fumaroles.
Azufral volcano's lavas contain more silica than the nearby volcanoes and rhyolitic-dacitic tephra deposits from explosive activity mantle the volcano.

1971 seismic swarm
Between 26 April and 7 May 1971, a swarm with more than 60 earthquakes under the volcano were felt by residents of Santander village. Some of the quakes were even detected by seismographs at Pasto seismic station 215 km from the volcano (Galeras volcano observatory).

See also: Sentinel hub | Landsat 8 | NASA FIRMS
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