Volcanology basics

Eruptions

Category archives for Volcanology basics

Satellite image of the island of Tenerife with the main vent of the volcano (El Teide) in the central part of the island. I will be out of town for the next few days, so I thought I’d leave this thread for breaking volcano news that any of you Eruptions readers notice. However, I couldn’t…

The Decade Volcanoes

Ulawun Volcano, Papau New Guinea, one of the “Decade Volcanoes” There was some discussion earlier about the so-called “Decade Volcanoes”, so I thought I’d elaborate a bit on them (doubly so in light of certain other lists.) These volcanoes are defined by IAVCEI – the International Association of Volcanology and the Chemistry of the Earth’s…

Image courtesy of Calvin Hall. Taken 3/28/2009 during an eruption at 10:59 AM3:28 PM. UPDATE 4/2/2009 at 11 AM Pacific: I’m moving this up from the comments, but Eruptions reader Doug Cole pointed out (and I have no idea how I missed this) that Redoubt has a new webcam! This one is at the DFR…

Image courtesy of the Southern California Earthquake Center I have to admit, I’ve only been perpherially following the earthquake swarm currently going on in Southern California, near the end of one of the strands of the San Andreas fault out below the Salton Sea (see the bottom of the map above). The “Bombay Beach” swarm…

Goma after the 2002 Eruption of Nyiragongo The activity at Redoubt has captivated a lot of us, but in the grand scheme of things, its eruption are more likely to caused inconvenience and property damage rather than dramatically loss of life (unless something huge and unexpected occurs). However, the same cannot be said if Nyiragongo…

Redoubt status returned to Orange

Image courtesy of AVO/USGS. Taken by Cyrus Read Based on the current levels of seismicity over the past 36 hours, AVO has returned Redoubt to Orange/Watch status from Red/Warning. This doesn’t mean that the eruption is over, just that things have settled down a bit. Flights to and from Anchorage have resumed as well. You…

Redoubt seems to be setting its pattern for this part of the new eruptive period. There was another small explosion this morning that produced at 15,000 foot / 5,000 meter ash column that moved to the NNW. The seismicity has settled down since the early morning eruption today (3/25) as well. These types of explosions…

FEMA and volcanoes

So, as I am apt to do from time to time, I was wandering the interweb and stumbled across the FEMA (Federal Emergency Management Agency) for Kids website. Naturally, I thought, what do they have to say about, oh, I don’t know, volcanoes. Well, was I in for a doozy! FEMA, in its infinite wisdom,…

Mixing volcanoes and oceans seem to always produce exciting results. Whether it is something as simple as the ocean entry of a lava to something as impressive as a new island emerging, formed by volcanic eruption. Back in the 1960s, a previous unknown undersea volcano off the coast of Iceland erupted to form the island…

A review of ash cloud classification

Jonathan Castro has reminded me that I need a refresher on the proper terminology for ash columns related to volcanic eruptions. It is very easy to start mincing words and using them inappropriately – and that is the sort of sloppy reporting and discussion I am trying to avoid. So, to refresh my (and our)…