Tongariro volcano news & activity updates
Tongariro volcano (New Zealand): increase in earthquakes and continuing unrest
Tuesday Jul 31, 2012 06:23 AM | AUTEUR : T
Recent earthquakes at Tongariro (GeoNet)
Sesimic activity has picked up under Tongariro volcano in New Zealand, GeoNet confirms in its latest bulletin. The earthquake activity had started on 13 July, peaked on 20 July, sharply decreased and picked up again with currently about 3-10 events per day. The earthquakes cluster in a zone between Mount Tongariro and the eastern side of Lake Rotoaira at 2-7 km depth. They are mostly very small and unlikely to be felt.
Seismic recording from 31 July - the red lines are earthquakes under the volcano (GeoNet)
are occurring each day.
Scientists have increased their monitoring of the volcano. Gas samplings of springs and fumaroles confirm that volcanic gases above normal levels are present.
A GPS instrument has been installed to detect possible ground movement. The alert level remains unchanged at 1 (out of 4).
Mount Tongariro is a volcanic complex north of Mount Ngauruhoe. It consists of numerous craters, cones and lava flows. The Te Māri craters lie about two kilometres east of Ketetahi hot springs on the north side of Mount Tongariro. They are the last craters to be active on Tongariro. Ash eruptions from Tongariro are recorded from 1855 to 1897, as well as unconfirmed activity in 1926-27.
Monday, Jul 30, 2012
A lot of seismic activity appears on the seismograph visible at Tongariro. There are no new reports by Geonet, and the status remains at yellow (1 out of 4). [details]
Tongariro volcano (North Island, New Zealand) activity update: weak seismic unrest, alert still at level 1
Friday, Jul 27, 2012
Mt. Tongariro volcano remains seismically active, but less than before. There are no further news from GNS science, but the alert level remains at 1. [details]
Monday, Jul 23, 2012
Tongariro volcano is showing signs of a possible awakening. On 13 July 2012, an increase in small (<M2.5) earthquakes was detected. The quakes were clustered at depths of 2-7 km under the area between Emerald crater and Te Mari crater. ... [details]