Aso (Japan)

Status Eruption Eruption 2019 1592m
Caldera (Subduction zone / Continental crust (> 25 km))

Aso

The 24-km-wide Asosan caldera was formed during four major explosive eruptions from 300,000 to 90,000 years ago. These produced voluminous pyroclastic flows that covered much of Kyushu. The last of these, the Aso-4 eruption, produced more than 600 km3 of airfall tephra and pyroclastic-flow deposits. A group of 17 central cones was constructed in the middle of the caldera, one of which, Nakadake, is one of Japan's most active volcanoes. It was the location of Japan's first documented historical eruption in 553 CE. The Nakadake complex has remained active throughout the Holocene. Several other cones have been active during the Holocene, including the Kometsuka scoria cone as recently as about 210 CE. Historical eruptions have largely consisted of basaltic to basaltic-andesite ash emission with periodic strombolian and phreatomagmatic activity. The summit crater of Nakadake is accessible by toll road and cable car, and is one of Kyushu's most popular tourist destinations.

The 24-km-wide Aso caldera was formed during four major explosive eruptions during the Pleistocene. These produced voluminous pyroclastic flows that swept over much of Kyushu. A group of 17 central cones, seen here from the ENE caldera rim, was constructed in the central part of the caldera. One of these, Naka-dake, is one of Japan's most active volcanoes, with historical eruptions dating back to 553 CE. The summit crater of Naka-dake is accessible by toll road and cable car, and is one of Kyushu's most popular tourist destinations.

Photo by Norm Banks, 1981 (U.S. Geological Survey).

Last updated 2020-04-07 07:00:04

Camera
Latest activity

Activity Continuing. Volcanic Ash AT 20200407/0600Z Flight Level 070 Extended South Observed Volcanic Ash Date and Time 07/0550Z

Tokyo VAAC - 2020-04-07 06:05:00 UTC ()

Activity Continuing. Volcanic Ash AT 20200407/0000Z Flight Level 060 Extended E Observed Volcanic Ash Date and Time 06/2340Z

Tokyo VAAC - 2020-04-07 00:04:00 UTC ()

Activity Continuing. Volcanic Ash AT 20200406/1800Z Flight Level 050 Extended Northeast Observed Volcanic Ash Date and Time 06/1750Z

Tokyo VAAC - 2020-04-06 18:04:00 UTC ()

Activity Continuing. Volcanic Ash AT 20200406/1200Z Flight Level 060 Extended Northeast Observed Volcanic Ash Date and Time 06/1150Z

Tokyo VAAC - 2020-04-06 12:03:00 UTC ()

Activity Continuing. Volcanic Ash AT 20200406/0600Z Flight Level 070 Extended E Observed Volcanic Ash Date and Time 06/0550Z

Tokyo VAAC - 2020-04-06 06:06:00 UTC ()

Activity Continuing. Volcanic Ash AT 20200406/0000Z Flight Level 070 Extended North Observed Volcanic Ash Date and Time 05/2350Z

Tokyo VAAC - 2020-04-06 00:06:00 UTC ()

Activity Continuing. Volcanic Ash AT 20200405/1800Z Flight Level 060 Extended Southwest Observed Volcanic Ash Date and Time 05/1750Z

Tokyo VAAC - 2020-04-05 18:03:00 UTC ()

Activity Continuing. Volcanic Ash AT 20200405/1200Z Flight Level 060 Extended South Observed Volcanic Ash Date and Time 05/1140Z

Tokyo VAAC - 2020-04-05 12:02:00 UTC ()

Activity Continuing. Volcanic Ash AT 20200405/0600Z Flight Level 050 Extended South Observed Volcanic Ash Date and Time 05/0540Z

Tokyo VAAC - 2020-04-05 06:03:00 UTC ()

POSS Activity Continuing. Volcanic Ash Cloud UNKNOWN AT 20200405/0000Z

Tokyo VAAC - 2020-04-05 00:03:00 UTC ()