Eruptions

Archives for February, 2009

Redoubt Mini-mini-update for 2/28/2009

As there has been a lot of chatter about the goings-on at Redoubt, I thought I’d post the latest AVO update (3:35 PM): Redoubt volcano has not erupted. Seismicity is dominated by small discrete earthquakes and tremor remains at the diminished levels of the past two days. Webcam images are now clear and show no…

Redoubt Mini-update for 2/26/2009

The Redoubt watch is now been going for well over a month and this is how quickly things can change when monitoring volcanoes. The headline in my volcano RSS, when I saw it said: “Redoubt quiets after weeks of activity, though eruption still possible” By the time I clicked on the link, the headline for…

The people who remain in Chaiten face the potential for a devasting pyroclastic flow, so says Jorge Muñoz of the SERNAGEOMIN in Chile. The volcano is still producing large ash columns on Tuesday and a flyover of the dome forming inside the caldera has lead to the concern that a collapse on a larger scale…

Volcano monitoring in the news

So, there has been a lot of talk about “volcano monitoring” over the last 24 hours, now hasn’t there? Now, I’m not going to revisit this discussion, but as an example of why it might be important, there is an article today about the location of the Bataan Nuclear Power Plant in the Philippines (near…

Redoubt Mini-update for 2/24/2009

Not much new to report with Redoubt except that folks in Alaska are getting, well, a little punchy. AVO currently reports (7:12 AM): Volcanic tremor and occasional discrete earthquakes continue at Redoubt. Since 00:00 local time on 2/24, tremor amplitude at nearby stations has gradually increased, and the number of small earthquakes on nearby stations…

I have never had to leave my home in an evacuation from a natural disaster. I’ll put that out there right now. So, I might not fully understand the emotions going through people when they find out that they have to leave their home by no fault of their own because nature has decided that…

Redoubt Mini-update for 2/23/2009

Nothing much to report on the Redoubt front except more of the same. The latest report from AVO says (6:44 AM): Redoubt Volcano has not erupted. Volcanic tremor and intermittent discrete earthquakes continue. Data for the past few hours (since 00:00 AST on 2/23) has consisted almost entirely of low-level tremor, with few discrete earthquakes.…

A third ocean lava entry at Kilauea

Lava issuing from the current eruptions at Kilauea have started a third ocean entry (and the second within the Hawai’i Volcanoes National Park). The entry is not as dramatic as some, forming a slow, dripping entry of lava into the ocean (see linked video footage), but every little drip adds a little more land to…

More activity at Galeras

Galeras, in Colombia, appears to have entered a new cycle of activity as it has erupted for the second time in a week. A large explosion occurred this morning that was accompanied by falling ash and rocks (ballistic bombs) from the event. It is unclear how far the volcanic products travelled from the vent, but Colombian officials…

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)…