Aso volcano news & activity updates
Aso volcano (Kyushu, Japan): large explosion on early 8 Oct 2016, ash plume to 11 km altitude
Sat, 8 Oct 2016, 12:0512:05 PM | BY: T
Area near Aso's Nakadake crater devastated by the explosion on 8 Oct 2016 (image: JMA)
A very strong explosion occurred at the volcano at 01:46 local time on 8 Oct 2016, generating an ash column that rose to an altitude of approx. 11,000 m making it one of the largest if not the largest in Japan in 20 years.
The crater after the explosion (image: JMA)
A vast area around the Nakadake crater was devastated by pyroclastic flows which reached up to 2 km distance, heavy ballistic impacts and ash falls.
A thick layer of ash now covers the areas around the crater including most of the tourist facilities. Light ash falls were recorded in up to 250 km distance.
The nature of the eruption is thought to be a phreatic (no involvement of fresh magma) or phreatomagmatic (water-magma interaction) explosion. Relatively low temperatures in the explosion were measured by instruments, making the first scenario more likely.
Tue, 8 Mar 2016, 12:05
JMA reported that at 0656 on 4 March an explosion at Asosan’s Nakadake Crater generated a milky-white plume that rose 1 km above the crater rim; white plumes rose 300 m afterwards. ... read all
Mon, 26 Oct 2015, 10:19
While the volcano continues to degas strongly and has intermittent, mostly small ash emissions, a stronger explosion occurred again early on 23 Oct around 6 am local time. read all
Thu, 8 Oct 2015, 08:43
The volcano continues to be at unrest. The main vent in the Nakadake crater continues to produce mild, sporadic ash emissions and intense degassing, creating a plume that rises few hundred meters. ... read all
Sat, 3 Oct 2015, 08:21
After the strong explosion on 14 Sep, the volcano has been rather calm, but continues to emit dilute ash plumes. The volcano remains at level 3 (out of 5) and access to the Nakadake crater closed. ... read all
Mon, 14 Sep 2015, 15:04
A powerful explosion occurred this morning from the Nakadake crater, producing a dense ash cloud that collapsed into several pyroclastic flows and rose approx. 2 km above the crater. ... read all