Volcano bits and bites - USA, Vanuatu, Indonesia, Peru, Sicily...

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This report is compiled out of many information sources and is brought to you by volcanologist Philippa (Demonte). Armand (Vervaeck) is backing her up as Philippa is sometimes too busy professionally to post updates.


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Kilauea: Halema'uma'u Crater + Pu'u O'o Crater, Big Island, Hawaii, USA (Philippa)
The lava lakes within both Halema'uma'u Crater (summit area) and the west pit of Pu'u O'o Crater on Kilauea volcano have both overflowed within the past week, and remain at high-stand levels.

The time lapse sequence (below) shows how the lava levels within Pu'u O'o rose around 7m in under a month, and became perched before overflowing.

via USGS Volcanoes (@USGSVolcanoes) / Hawaiian Volcano Observatory

Overflows from the perched lava pond within west pit, a small crater adjacent to the main Pu‘u ‘Ō‘ō crater on Kīlauea Volcano’s East Rift Zone, continue to build up the levees around the pond. The rising level of the perched lava pond is a sign of the increasing pressure within the magma system beneath Pu‘u ‘Ō‘ō. This overflow, captured by a USGS-Hawaiian Volcano Observatory time-lapse camera, occurred on April 17, 2018.

Image of Pu'u O'o Crater, taken during a helicopter overflight on 18 April 2018, with the west pit in the foreground.

via USGS Volcanoes (@USGSVolcanoes) / Hawaiian Volcano Observatory

Image from the Halema'uma'u Crater thermal-imaging webcam around 12 noon on 23 April 2018. This image shows that the lava lake is still almost level with the floor of the crater.

via USGS Volcanoes (@USGSVolcanoes) / Hawaiian Volcano Observatory

Manaro Voui crater, Ambae, Vanuatu (Philippa)
The eruption from Manaro Voui crater on the island of Ambae continues, and the Volcanic Alert Level is still at 3 (out of 4 levels). Both the cone and the crater within the cone continue to increase in size.

via Brad Scott (@Eruptn) / Vanuatu Meteorology and Geo-Hazards Department (@vmgdVU)

The image (below), taken from a different angle on 21 April 2018, shows that ash emissions have now ceased, although steam / volcanic gas emissions persist, and that Lake Voui has now separated in two due to the growth of the eruption cone.

via Brad Scott (@Eruptn) / Vanuatu Meteorology and Geo-Hazards Department (@vmgdVU)

Meanwhile, the humanitarian crisis worsens on the island. A state of emergency was declared last week. 750 people have lost their homes, either as a direct result of volcanic ash fall, or indirectly due to landslides, and 11,000 people local inhabitants are at risk of both short and long-term health problems. (Information source: United Nations Office for the Coordination of Humanitarian Affairs - Asia Pacific).

Local residents are still waiting to be evacuated off the island. The process is being hampered by logistics, the estimated potential cost of a (permanent) evacuation (~US$1.8 million) and how this is going to be paid for, and where inhabitants can permanently be re-settled to on neighbouring islands.

via RNZ

https://www.radionz.co.nz/international/pacific-news/355823/ambae-evacuation-could-cost-millions

The ship RVS Tukoro was meanwhile last week making its way to Ambae to provide aid and support to the island's inhabitants.

via UNICEF Pacific (@UNICEFPacific)

Some tribal men want near the crater for rituals. These are a couple of the images they have taken (images courtesy Vanuatu news facebook)

Sinabung, Sumatra, Indonesia  (Philippa)
The first image (below) shows Mount Sinabung erupting on 22 April 2018. Compared with the image (below that) taken on 12 April 2018, and we can see that the latest eruption is less ash-rich than 10 days prior. It will be interesting to see what Sinabung does next: quieten down slightly, or extrusion of another lava dome, which pressurizes the volcanic system leading to larger, more explosive eruptions again?

via Endro Lewa (https://www.facebook.com/endrolewa)

El Misti, Peru (Philippa)
The photo (below) makes us at Earthquake-Report.com very happy, and not just because it features the crater rim of El Misti volcano. All of the women featured are volcanologists - but more than this, they are the leading volcano researchers and volcano monitoring managers in their respective areas from around the world, including the U.S., New Zealand, and Costa Rica. To us, they are sheroes (legends)!

The field trip to El Misti near the Peruvian city of Arequipa was part of a workshop on assessing volcanic hazards.

El Misti last erupted in 1985. The volcano has mostly been 'quiet' since then, other than a couple of seismic swarms of volcano-tectonic (VT) events in 2014, which are indicative of the country rock breaking underground as magma ascends.

via Ramón Espinasa Pereña / IAVCEI Commission on Volcanic Hazards and Risk
(https://www.facebook.com/groups/iavceihazardsandrisk/)

El Misti volcano - view from Arequipa
- via Jan Lindsay (@GeoJanUoA) / IAVCEI Commission on Volcanic Hazards and Risks
(https://www.facebook.com/groups/iavceihazardsandrisk/)

Mount St Helens, Washington State, USA (Philippa)
The U.S. Geological Survey (USGS) are running a series of articles which retrospectively follow the week-on-week geophysical precursors and media reporting of the May 1980 eruption of Mount St Helens.

The USGS report from 18th April 1980 mentioned that there had been around 12 small-scale explosive eruptions of steam and ash at the summit area within a 24-hour period, but the main hazard was the instability of the north flank of the volcano.

With logging roads becoming accessible again as the winter snow melted, there was also concern for how to keep curious visitors away from the volcano before a bigger eruption.

The full article can be read here:
https://www.facebook.com/USGSVolcanoes/posts/2000928369935714

via USGS Volcanoes (@USGSVolcanoes)

Mount Etna, Sicily, Italy (Philippa)
A snow- and hail-covered Mount Etna, as seen on 22 April 2018 from a helicopter following a thunderstorm.

via Boris Behncke (@etnaboris)

Yellowstone, Wyoming, USA (Philippa)
If any of you who read the Earthquake-Report.com happen to live in Gardiner, Montana, in the U.S., look out for this public event next month featuring scientists from the Yellowstone Volcano Observatory.

via Annie Carlson / Geyser Gazers (https://www.facebook.com/groups/4939307398/)

Meanwhile, click on the link (below) to enjoy this (hydrothermal = hot water) eruption from Grand Geyser filmed on the opening day of Yellowstone National Park after winter.

via Jake Frank / Geyser Gazers

Grand Geyser eruption - posted 20 April 2018

April 24, 2018


Weekly Volcanic Activity Report: 11 to 17 April 2018
Via Smithsonian Institution - Global Volcanism Program / US Geological Survey

Ambae | Vanuatu
Based on observations from satellites, webcams, pilots, and the Vanuatu Geohazards Observatory (local community reports), the Wellington VAAC reported that during 11-14 April ash plumes from the vent at Ambae’s Lake Voui rose to altitudes of 1.8-4.9 km (6,000-16,000 ft) a.s.l. and drifted N, NW, W, and SE. On 12 April news articles noted that ashfall had affected the N part of Ambae, with photos showing thick ashfall deposits on houses and agricultural land, and reports of contaminated water supplies. On 15 April a VAAC office reported that the eruption has ceased. The Alert Level remained at 3 (on a scale of 0-5).

Langila | New Britain (Papua New Guinea)
Based on analyses of satellite imagery and wind model data, the Darwin VAAC reported that on 15 April a discrete, low-level ash plume from Langila rose to an altitude of 3.7 km (12,000 ft) a.s.l. and drifted S.

Sinabung | Indonesia
PVMBG reported that at 0640 on 12 April an event at Sinabung generated an ash plume that rose 200 m and drifted WNW. At 1655 pyroclastic flows generated ash plumes that drifted WSW. At 0827 on 15 April an event generated an ash plume rose 1 km and drifted WNW. The Alert Level remained at 4 (on a scale of 1-4), with a general exclusion zone of 3 km and extensions of 7 km on the SSE sector, 6 km in the ESE sector, and 4 km in the NNE sector.

April 19, 2018



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Volcano news - Archive Nr. 17

Volcano news - Archive Nr. 16

Volcano news - Archive Nr. 15

Volcano news - Archive Nr. 14

Volcano news - Archive Nr. 13

Volcano news - Archive Nr. 12

Volcano news - Archive Nr. 11

Volcano news - Archive Nr. 10

Volcano news - Archive Nr. 9

Volcano news - Archive Nr. 8

Volcano news - Archive Nr. 7

Volcano news - Archive Nr. 6

Volcano news - Archive Nr. 5

Volcano news - Archive Nr. 4

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Volcano news - Archive Nr. 2

Volcano news - Archive Nr. 1

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Comments

  1. Hmm is anyone else encountering problems with the images on this blog
    loading? I'm trying to determine if its a problem on my end or if
    it's the blog. Any suggestions would be greatly appreciated.

  2. Are there any volcanic action around Mexico City?

  3. bocquez says:

    Perfekt