Iwo-jima volcano (Volcano Islands, Japan) activity update: weak degassing, occasional volcanic tremors
lundi déc. 10, 2012 05:51 | AUTEUR : T
Visual observation via a camera installed at Asodaihigashi (about 900 m east-northeast of the Asodai collapse pit) showed that the volume of fumes from the pit (located at the west of Ioto Island) was small, and that their heights ranged from 0 to 100 m.
No fumes were observed at Idogahama to the northeast of the island.
Seismic activity remained at low levels. A volcanic tremor was observed at 20:22 JST on November 27th, which lasted for duration of no more than 1 m 10 s. No changes in volcanic earthquake conditions, infrasound and surface phenomena were observed during this event. Volcanic tremor was observed for the first time since July
23rd, 2012. According to deformation data obtained from observations conducted by the Geospatial Information Authority (GSI), ground deformation in the area has now been in an almost static state.
(JMA Monthly Volcanic Activity Report November 2012)
- Informations sur: Iwo-jima (Ioto) volcan
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