Blog Profile / Volcanism
| URL : | http://volcanism.wordpress.com | |
|---|---|---|
| Filed Under: | Academics / Geology | |
| Posts on Regator: | 1026 | |
| Posts / Week: | 4.4 | |
| Archived Since: | December 10, 2008 | |
Blog Post Archive
Daily Volcano Quote: the ubiquity of volcanic forces
If now, however, we take a broader view of volcanic phenomena, and, in addition to the … still existing proofs of the general distribution of volcanic centres, as they have been termed, we also take into consideration the occurrence of eruptive rocks of similar origin which are everywhere found disturbing and breaking through the strata [...]
A look at Nabro’s history
Nabro is a little-known volcano. Its remote and inhospitable location has meant that very limited fieldwork has been carried out, and much of what we do know comes from remote sensing. Pierre Wiart and Clive Oppenheimer have analysed much of what is known about Nabro in a very useful paper published in the Bulletin of [...]
Nabro eruption quieter, but continuing
The eruption at Nabro is continuing. The announcement by Toulouse VAAC yesterday that the eruption had ‘stopped’ was, as we said at the time, not definitive. The latest from Toulouse (18:00 UTC 18 June 2011) is that the ‘eruption currently gets weaker’ and that the plume is ‘mainly composed of SO2 and water vapor’. The [...]
The Daily Volcano Quote: oceans of lava
From the record of the eruptions of Vesuvius it is evident that the volcanic energy has been increasing in intensity from the time of Pliny down to the present day. During the last two hundred and thirty-eight years more eruptions have been recorded than during the whole of the preceding eighteen centuries. The same increase [...]
Reports from Nigeria: dormant volcano stirring?
Some rather strange reports from Nigeria seem to suggest some kind of volcanic activity in Gombe State in the north-east of the country: emissions of some kind, possibly including toxic/environmentally harmful gases, have apparently been taking place in the Abaduguri range in Funakaye Local Government Area. North-eastern Nigeria does have a history of active volcanism [...]
Nabro eruption stopped – Toulouse VAAC
The Toulouse VAAC has issued a new volcanic ash advisory since our last update on Nabro was published earlier this morning. The advisory was issued at 06:00 UTC 17 June 2011 and reports that ‘eruption stopped 16/1500Z’, that is, 15:00 UTC on 16 June (an earlier advisory at 00:00 on 17 June had indicated that [...]
Nabro update, 17 June 2011
The most recent volcanic ash advisory for Nabro volcano in Eritrea, issued by the Toulouse VAAC at 18:00 UTC on 16 June 2011, reports that the emissions are ‘mainly composed of SO2?. Satellite images currently show no sign of ash, but there is much evidence of copious sulphur dioxide emission. OMI data (from the ESA’s [...]
The Daily Volcano Quote: subterranean oxidation
We are left entirely to hypothesis as to the cause of earthquakes and volcanic eruptions, but of the oneness of that cause no doubt remains. The theory first started by Sir Humphrey Davy, suggested by his discovery of the metallic bases of the earths and alkalis, and since elaborated by Dr. Daubeny, has found very [...]
Smithsonian/USGS Weekly Volcanic Activity Report 8-14 June 2011
The Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Report, compiled by Sally Kuhn Sennert, has been issued for the week 8-14 June 2011. Another week high in volcanic interest: Kizimen: eruptive episode with ash plumes reaching 4-5 km altitude Nabro: eruption following an earthquake swarm sent ash to 13.7 km altitude Puyehue-Cordón [...]
The Daily Volcano Quote: ethical problems in volcano tourism
Viewing volcano tourism through a dark spectrum lens raises some interesting ethical questions. For example, how soon after a major eruption is it acceptable to put on display the remnants of a disaster that has caused loss of life? In the case of Pompeii, several millennia have passed since the deaths of the town’s inhabitants [...]
Nabro eruption calming down?
[Just a quick update on the Nabro eruption, as I have a busy day today.] Satellite images of Eritrea and Ethiopia this morning seem to show a quieter situation at Nabro, the Eritrean volcano that began erupting on Sunday night and produced an impressive plume yesterday. No sign of such a plume today: on first [...]
Puyehue-Cordón Caulle update, 13 June 2011
Above: Puyehue-Cordón Caulle, 13 June 2011: image from camera number 2 at 20:50 GMT. Below: by 22:05 GMT the sky is darkening over the volcano and incandescence is visible at the bottom of the plume (OVDAS-SERNAGEOMIN). As the pictures at the head of this post indicate, the eruption at Puyehue-Cordón Caulle is still going strong. [...]
Official Eritrean statement on the Nabro volcanic eruption
A statement on the Nabro eruption has just appeared on Shabait.com (‘Serving The Truth’), the news and information website for the Eritrean Ministry of Information: Volcanic eruption witnessed in the tip of Southern Red Sea Region. Text as follows: Assab, 13 June 2011 -A volcanic eruption was witnessed in the tip of the Southern Red [...]
Eritrea eruption update: Nabro volcano erupts
Ever since news of the eruption in Eritrea began to seep out early today the identity of the volcano responsible has remained unclear. Dubbi was a prime candidate (and that’s the one Toulouse VAAC went for) but with the release of high definition MODIS satellite imagery from the Aqua satellite it is now pretty clear [...]
The Daily Volcano Quote: eruption in Eritrea, May 1861
A native of Edd states as follows: On the night of the 7th or morning of the 8th of May, the people of Edd were awakened by the shock of an earthquake, followed by others, which continued with little intermission for about an hour. At sunrise, a quantity of fine white dust fell over the [...]
Eruption in Eritrea: 1,000 km plume
Infrared image of Eritrea eruption plume, 13 June 2011 07:30UTC (Sat24.com/Eumetsat/Met Office) A significant eruption is evidently under way at Dubbi volcano (although there is still some doubt about the precise identity of the volcano involved) in Eritrea, north-east Africa. An earthquake swarm occurred during during the evening of 12 June, with moderate quakes followed [...]
Puyehue-Cordón Caulle update, 12 June 2011
The Chilean Servicio Nacional de Geología y Minería (SERNAGEOMIN) has issued its latest bulletin on the activity at Puyehue-Cordón Caulle: Reporte Especial de Actividad Volcánica No 36, 11 June 2011 (the PDF has not been posted yet). Overall the eruption shows no sign of coming to an end: the key word in this bulletin, as [...]
More on Puyehue-Cordón Caulle
Chile’s OVDAS (Observatorio Volcanológico de los Andes del Sur) currently has three webcams monitoring Puyehue-Cordón Caulle. There are some reliability problems: their images freeze from time to time, and one of them fell into a box earlier today. It’s back out again now and just provided the view above (camera number 2): the east-trending plume [...]
A webcam for Arenal
Even in Costa Rica, a land well-provided with active and spectacular volcanoes, Arenal stands out as something special. It’s now possible to keep a close watch on Arenal via a new webcam installed by the Observatorio Vulcanológico y Sismológico de Costa Rica (OVSICORI-UNA). It is located to the south of Arenal 1.4 km from the [...]
Puyehue-Cordón Caulle update, 11 June 2011
The image above comes from the European Space Agency, and shows the sulphur dioxide plume released by the eruption at the Puyehue-Cordón Caulle volcanic complex. The image was captured on 6 June 2011 by the Infrared Atmospheric Sounding Interferometer on Eumetsat’s MetOp-A satellite. The eruption continues at Puyehue-Cordón Caulle: the overall picture appears to be [...]