White Island volcano (New Zealand): series of seismic swarm

Wed, 5 May 2021, 05:56

05:56 AM | BY: MARTIN

Gas flight conducted on 30 April over White Island volcano (image: GeoNet)

A series of seismic swarm leading to a volcanic tremor was recorded in the evening of 29 April as the volcano observatory GNS New Zealand reported.
This episode is likely caused by a series of low-energy subterranean explosions. Similar periods of activity were observed in mid-February and early-mid March, returning to typical low levels shortly afterwards.
An observation flight conducted on 30 April confirmed no ejected material from this seismic activity – unlike in previous episodes when ejected material was seen within metres from the active vent. No observations of changes were seen on the island's webcams.
Gas and steam emission plumes continue at stable levels since March.
The Volcanic Alert Level remains at 1 and the Aviation Colour Code remains at Green.
Source: GeoNet New Zealand volcano activity update 5 May 2021

All news about: White Island volcano
Information about: White Island volcano

Previous news

Wed, 28 Apr 2021, 06:00

Whakaari/White Island volcano (North Island, New Zealand) - Smithsonian / USGS Weekly Volcanic Activity Report for 28 April-4 May 2021 (Continuing Activity)

GeoNet reported that a brief period of low-energy tremor and acoustic signals was recorded at Whakaari/White Island beginning at 2230 on 29 April. During an overflight on 30 April scientists did not observe new deposits near the active vent or thermal anomalies at the active vent area. Gas-emission rates had been relatively unchanged since March. ... Read all

Tue, 16 Mar 2021, 07:56

White Island volcano (New Zealand): steam explosions and two phases of tremor

Steam and gas from White Island volcano active vent area yesterday (image: GeoNet)

GNS New Zealand noted that two short-lived episodes of low-level volcanic tremor occurred on 11 and 12 March at the volcano. ... Read all

Fri, 19 Feb 2021, 08:23

White Island volcano (New Zealand): series of steam explosions

Lots of steam and gas at White Island volcano (image: Brad Scott/twitter)

A series of minor steam explosions from the active vent occurred at the volcano at about 02:20 local time today detected by seismic instruments as the volcano observatory GeoNet reported. ... Read all

Wed, 17 Feb 2021, 06:00

Whakaari/White Island volcano (North Island, New Zealand) - Smithsonian / USGS Weekly Volcanic Activity Report for 17 February-23 February 2021 (Continuing Activity)

GeoNet reported that beginning around 0220 on 19 February a series of short-lived, low-energy steam explosions at Whakaari/White Island were recorded for about 100 minutes by local seismic and acoustic instruments. Webcam images were dark due to the time of day; no trace ash deposits were visible. Tremor had begun around 2100 the night before and then ceased at 0550 when the steam explosions ended. ... Read all

Wed, 3 Feb 2021, 07:51

White Island volcano (New Zealand): year-long monitoring reveals declining vent temperatures

Gas emissions on the crater floor at White Island volcano today (image: GNS)

Over the last year, a series of thermal infrared images have been regularly collected by helicopter to observe the temperature of steam and gas vents as reported GNS volcanological observatory. Temperatures have shown a gradual decline since the December 2019 eruption, from over 700 °C in February 2020 to 300 °C on 21 January 2021. The gas emission temperatures are now similar to temperatures measured in July 2018. ... Read all

Wed, 27 Jan 2021, 06:00

Whakaari/White Island volcano (North Island, New Zealand) - Smithsonian / USGS Weekly Volcanic Activity Report for 27 January-2 February 2021 (Continuing Activity)

GeoNet reported that during the previous year temperatures of Whakaari/White Island's steam and gas vents were regularly captured during helicopter overflights. These data showed a downward trend from temperatures of over 700 degrees Celsius in February 2020 to temperatures around 300 degrees Celsius recorded on 21 January. The recent gas-emission temperatures were similar to those measured in July 2018. ... Read all

White Island volcano (New Zealand): series of seismic swarm

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