Tongariro volcano (North Island, New Zealand) - Smithsonian / USGS Weekly Volcanic Activity Report for 15 April-21 April 2015 (New Activity / Unrest)
On 20 April GeoNet reported that it had been three weeks since anomalous seismicity at Tongariro's Ngauruhoe cone had been detected. In addition, no anomalous ground temperatures or unusual levels of gas emissions were detected at the summit during fieldwork, indicating that the minor unrest had ceased. The Volcanic Alert Level was lowered to 0 (on a scale of 0-5).
Mi, 15. Apr 2015, 06:0006:00 AM | VON: VN
From: Global Volcanism Program, 2015. Report on Tongariro. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 15 April-21 April 2015. Smithsonian Institution and US Geological Survey.
Mi, 18. Mär 2015, 06:00
Tongariro volcano (North Island, New Zealand) - Smithsonian / USGS Weekly Volcanic Activity Report for 18 March-24 March 2015 (New Activity / Unrest)
On 23 March GeoNet reported that during the previous two to three weeks an increase in the number and magnitude of earthquakes at Tongariro was detected by the seismographs around Ngauruhoe. The earthquakes were shallow, with depths less than 5 km. The report noted that although earthquakes are not unusual near Ngauruhoe, it had been some time since significant numbers or events above M 1 were recorded. ... Read all
Di, 6. Aug 2013, 07:27
During the past two weeks, GeoNet has been recording very small earthquakes beneath the volcano. The quakes were too small to be located but show up on local seismic stations. ... Read all