Lahar

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Category archives for Lahar

Before we get to the latest SI/USGS Weekly Volcanic Activity Report (WVAR), I wanted to draw your attention to some nifty NASA Earth Observatory images from the current activity at Soufriere Hills in Montserrat. After a few puffs last week, the volcano is now releasing a relatively constant stream of ash and steam, this after…

MVP #1: Concepcion, Nicaragua

The first Mystery Volcano Photo (MVP, for short) seem to go well and indeed, the volcano in question was Concepcion in Nicaragua. Congratulations to volcanista for nailing it on the first try. I’ll have to keep a tally of the winners for each MVP to name a, well, MVP MVP. So far, the scoresheet looks…

Eruption at San Cristobal UPDATED

San Cristobal in Nicaragua I don’t have much in the way of details, but the Associated Press is reporting that San Cristobal in Nicaragua has erupted this evening. The volcano reportedly experienced an explosive eruption and that nearby villages (how nearby is unclear) have received ash fall from the eruption. If it is any indication,…

Monday Musings

Does anyone else feel like this has been a rather quiet summer, volcano-wise? Maybe I’ve been too preoccupied by my move to Ohio, but I feel like beyond a few relatively minor events (Shiveluch comes to mind), the volcano news has been pretty slow compared to the spring of this year. Go figure. The sulfur…

A wrap up of the week’s volcanism, brought to you by Sally Kuhn Sennert and the USGS/SI Global Volcanism Program. Highlights, not including Sarychev Peak, Redoubt and Shiveluch (busy week in the north Pacific), include: A small ash cloud was spotted at Bagana in Papua New Guinea. The Tavurvur cone at Rabaul (PNG) continues to…

Eruptions Mailbag for June 2009

Chaiten in Chile erupting in January 2009. Even after over a year of activity, Eruptions readers are still captivated by the volcano. Thanks for sending me your questions about volcanoes and volcanism. I’ll try to tackle some hear – but as always, keep the questions coming! Send them to For those of you who have…

Volcano Profile: Mt. Vesuvius

The latest in my Volcano Profiles Series, we turn to Europe and Vesuvius. You could fill many, many volumes with the works produced on Vesuvius since Roman times. This profile will barely scratch the surface when it comes to the vast geologic and human history surrounding the volcano, but it is a start. If you…

Your weekly dose of volcanic activity from the USGS/SI. (a little late thanks to an exciting day of column chemistry). Some highlights include: A 3.7 km / 12,000 foot ash plume from Karangetang in Indonesia (great name, eh?) Lava flows, ash plumes and local ash falls from Slamet in Indonesia. White and grey ash plumes…

The clock is ticking for the new dome growing at Redoubt to collapse. What will happen if/when it does collapse? Good question! The new dome at Redoubt. Image courtesy of AVO/USGS, taken by Game McGimsey, April 30, 2009. Most likely, the following will occur: First, extrusion of lava will cause the dome to over-steepen, precipitating…

Chaiten erupting in May 2008. Image courtesy of ONEMI. Speaking of anniversaries, this weekend is the one-year mark for the Chaiten eruption (in spanish) in Chile, the first eruption at the volcano in ~9,000 years. Yes, indeed, the rhyolite eruption that caught most everyone by surprise is still going strong one year later, with two…