Your weekly dose of volcanism from the USGS/Smithsonian Global Volcanism Program.
Highlights (not counting Mayon), include:
- The activity at Mando Hararo in Ethiopia appears to be a fissure eruption. Ground observations saw a 4-5 kilometers / ~2.5-3 mile fissure with new predominantly 'a'a lava flows that were 2-3 m thick ... the fissure was lined with scoria ramparts 30-50 m high. They did not see any active lava, though.
- As some Eruptions readers have pointed out from the OMI SO2 maps, Sarychev Peak (Russia) is still producing gas-and-steam (with some ash) plumes, mostly drifting off to the east of the volcano.
- Shishaldin in the Aleutians saw its Alert status changed to Yellow/Advisory by AVO. A thermal anomaly seen via satellite in the crater has been growing more intense recently. The anomaly was first noticed in January of 2009. The volcano last erupted in 2004.
- Explosions and 4-4.5 km / 13,500-15,000 foot ash columns were produced at Fuego in Guatemala. There was also some incandescent ejecta spotted being thrown 75 m / ~250 feet from the crater.
- Shiveluch in Kamchatka (Russia) continues to rumble, with gas-and-steam plumes with ash produced by explosions reaching as high ~5.3 km / 13,400 feet.
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Sally Sennert from the Smithsonian Institution sent me an email to say that this week's USGS/Smithsonian Institute Weekly Volcanic Report will be delayed due to the inclement weather in the Washington DC area. She can't connect with the server, so the report can't be updated on the Smithsonian…
The latest news from the USGS/Smithsonian Global Volcanism Program Weekly Volcano Report ...
Highlights (not including Mayon) include:
Strombolian eruptions and small pyroclastic falls at Arenal in Costa Rica.
3 km / 10 000 foot ash plume from Bagana on Bougainville Island in Papua New Guinea.…
All the volcano news that is fit to print, all thanks to the USGS/Smithsonian GVP!
Highlights (not include Manda Hararo, Kilauea and Mayon) include
San Miguel in El Salvador has been experiencing increased seismicity. The last time the volcano erupted was in 2002.
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We've made it to Ohio! Tomorrow I'll hopefully be returning to regularly scheduled updates, but until then, enjoy this week's SI/USGS Weekly Volcano Report.
Highlights include:
KVERT mentions that seismicity has increased recently at both Kizimen and Kliuchevskoi on the Kamchatka Peninsula.
~4 km…
Interesting that Shishaldin is brewing up again; I've always been fascinated by this volcano, one of those frequently-active but generally well-behaved ones that rarely make the news. Couple of odd facts: first known ascent in May 1932 by a team led by Jesuit priest/geologist Bernard Hubbard..who found that at that time it had no defined crater. It's also acquired a plethora of different names...Sisquk, Shishaldin, Caroli and the colloquial 'Smokin' Moses'
Well, then you should check out today's post : http://scienceblogs.com/eruptions/2009/07/is_something_up_at_shishaldin….
Could not have arrived at a much better time. Superb write-up.