Lahar

Eruptions

Category archives for Lahar

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…

Image by AVO/USGS/Game McGimsey, March 23, 2009 Redoubt has simmered down some today with no new eruptions since yesterday evening. AVO’s field crew not only fixed the Hut webcam, but also spotted massive lahar deposits (see above) in the Drift River valley that traveled 35 kilometers downstream and have officials on local and national levels…

Image courtesy of AVO/USGS AVO has posted a series of images taken around Redoubt and around the Cook Inlet since the new eruptions started the night of March 22nd. You can begin to see the extent of the ash fall, what the explosions have done to the Drift Glacier and the new deposits in the…

The Hut webcam at Redoubt that has a great view of the hydrothermal vents near the 1989-90 domes – and the area where the current eruption is likely to be sourced – is back online. So far, we can see what looks like lahar deposits on the lower left-hand flanks of the volcano in the…

Redoubt Erupts!

Mt. Redoubt in March 2009, prior to erupting At ~10:30 PM (Alaskan Time) last night, Mt. Redoubt erupted. AVO and the Anchorage VAAC issued a Red Alert for ash as high as 50,000 feet (15,000 meters) around the volcano. Information is scarce about the exact nature of the ash cloud because of the fact that…

Evacuations continue at Huila

The Colombian government has extended the evacuations near Nevado del Huila, taking 800 families out of the danger zone near the rumbling volcano. Huila has been making a lot of noise as of late, and Colombian officials in Ingeominas and the National System for Emergencies are worried that the volcano will erupt soon, sending avalanches and lahars…

More evacuations near Huila

The lahars and mudslides near Nevado del Huila – or, in particular, the threat of more – have prompted more evacuations. Although the known death toll from the eruption and its associated lahars is still officially only in the low double digits, at least 150 people are still missing, so that may change. You can…

I’ve found a few more details about the ongoing activity at Huila in Colombia, including a video report from the BBC. It seems that the eruption at Huila is a photocopy of what happened at Nevado del Ruiz in 1985 in its style: hot ash and gasses erupted from the crater melted ice/snow near the…

Huila eruption produces fatalities

I have been out of town for the past few days, but we do have some big (and unfortunate) news from Colombia. Nevado del Huila in southwestern Colombia erupted today and the ensuing lahar (or volcaniclastic debris flow – it is hard to tell from the reports) killed at least 4 people, and possibly as…

Just a brief note, but today (November 13) is the 23rd anniversary of the disastrous lahar at Nevado del Ruiz in Colombia. Over 23,000 people died when a lahar, started by a relatively minor eruption of the volcano, swept down the river valleys the side of the edifice and destroyed Armero and Chinchina. The footage of…