Volcanoes
Mexico's Popocatepetl volcano has spewed ash over several towns in the central state of Puebla, just 55 kilometers (35 miles) southeast of Mexico City, but the country's capital was spared.
The volcano blew a huge stack of smoke that went 3,200 meters (10,500 feet) skyward late Tuesday, but surrounding residents were not in danger, said Jesus Morales, Puebla's civil protection director.
A three-centimeter (one-inch) thick carpet of ash covered nearby towns, forcing people to wear masks. The National Disaster Prevention Center said Wednesday that ash also fell in the state capital of Puebla.
The 5,452-meter (17,900-foot) high Popocatepetl is Mexico's second highest peak after the Citlaltepetl volcano.
A three-centimeter (one-inch) thick carpet of ash covered nearby towns, forcing people to wear masks. The National Disaster Prevention Center said Wednesday that ash also fell in the state capital of Puebla.
The 5,452-meter (17,900-foot) high Popocatepetl is Mexico's second highest peak after the Citlaltepetl volcano.
Update time = Tue May 7 9:00:02 MDT 2013
Magnitude 2.9 2013/05/07 07:22:33 44.583N 110.976W 9.5 14 km ( 8 mi) SE of West Yellowstone, MT
Here are the 30 most recent earthquakes and all M>3 earthquakes on this map...
Magnitude 2.9 2013/05/07 07:22:33 44.583N 110.976W 9.5 14 km ( 8 mi) SE of West Yellowstone, MT
One of the Philippines' most active volcanoes spewed huge rocks and ash after daybreak Tuesday, killing at least five climbers and trapping more than a dozen others near the crater in its first eruption in three years, officials said. Rescue teams and helicopters were sent to Mayon volcano in the central Philippines to bring out the dead. At least seven were injured from a group of about 20 mountaineers who were caught by surprise by the sudden eruption, Albay provincial Gov. Joey Salceda said. Clouds have cleared over the volcano, which was quiet later in the morning. The climbers who died were struck by huge rocks, guide Kenneth Jesalva told ABS-CBN TV network by cell phone from a camp near the crater. They included a German, an Austrian and a Filipino.
The injured included foreigners and Filipino guides. Some were in critical condition, said the chief of the national disaster agency, Eduardo del Rosario. Jesalva said he was in the group that spent the night on the picturesque mountain, known for its almost-perfect cone, when the volcano rumbled back to life early in the morning and rocks "as big as a living room" came raining down on them. He rushed back to the base camp to call for help.
The injured included foreigners and Filipino guides. Some were in critical condition, said the chief of the national disaster agency, Eduardo del Rosario. Jesalva said he was in the group that spent the night on the picturesque mountain, known for its almost-perfect cone, when the volcano rumbled back to life early in the morning and rocks "as big as a living room" came raining down on them. He rushed back to the base camp to call for help.
© Alaska Volcano Observatory
John Power is a seismologist with the Alaska Volcano Observatory. He writes in an email that the explosions were "similar in size to what we have seen over the past several years," although he notes that it is unusual to have three in a row.
Power says satellite imagery and a webcam in the nearby village of Nikolski show that the volcano is continuing to emit small amounts of gas, ash and steam, with plumes rising to 15,000 feet. There's no real-time monitoring network on the volcano.
Cleveland lies on a major international flight path, and in light of the explosions the Observatory has raised the aviation alert level from yellow to orange. They warn that there is the possibility of sudden explosions reaching above 20,000 feet, but so far there have been no reported disturbances to air travel.
Cleveland is one of the most active volcanoes in the Aleutians, erupting roughly two dozen times in 2012. It's last major eruptive period was in 2001, when the volcano sent ash clouds up to 39,000 feet.
Australia's only active volcano is rumbling fiercely, with new NASA photos revealing its lava lake has overflowed its crater. The volcano in question, Big Ben, is happily located on Mawson Peak in the remote southern reaches of the Indian Ocean on Heard Island, an Australian territory. People only bother to visit Heard and its neighbour McDonald Island every couple of years, because there's little there but chilly wastelands and the territory is a nature reserve people aren't allowed to visit without a permit. Even fisherfolk chasing the apparently tasty patagonian toothfish, aka Chilean Sea Bass, don't often bother landing.
No permanent human presence exists on the islands, beyond an automated weather station. NASA keeps an eye on the islands, though, because of the volcano atop Heard Island's Big Ben occasionally fires up. Last October we reported things have started to look interesting on the island. NASA has now released the image below showing that the volcano's caldera appears to have filled with so much lava that some has since cascaded down Mawson Peak's flanks.
© NASA
As North America slowly drifted over the hotspot, the Yellowstone plume punched through the continent's crust, leaving a bread-crumb-like trail of calderas created by massive volcanic eruptions along Idaho's Snake River Plain, leading straight to Yellowstone. The last caldera eruption was 640,000 years ago. Smaller eruptions occurred in between and after the big blasts, most recently about 70,000 years ago. The magma chamber seen in the new study fed these smaller eruptions and is the source of the park's amazing hydrothermal springs and geysers. It also creates the surface uplift seen in the park, said Bob Smith, a seismologist at the University of Utah and author of a related study presented at the meeting.
The average thickness of the spouted material is 120 cm. A lot of cracks have appeared as a result of the volcano. One of them is too big. It spread out over 2 km. The depth of the crack is 2 m, width between 30 - 80 cm. At present the volcano has calmed down. Usually flames are observed when mud volcanoes erupt. No flame is observed in this volcano," he said. According to the department chief, the diameter of the volcano is about 10 sq km meters: "Several volcanic areas separated from each other are located in the crater of eruption. Every time eruption occurs in a separated volcanic area. 21 percent of mud volcanoes in Azerbaijan pull a lot of oil out of surface. This volcano is also spewing oil. Oil soaked into all wastes. It should be noted that there was also oil shale. All of them will be studied in the laboratory and concrete information about the oil and gas resources of the area will be obtained after the tests." - NEWS.AZ
A geophysical engineer at the Department, Sylvain Todman, says local communities are being warned to cover their water tanks and to be aware that ash could spoil gardens and fragile vegetables.
"It means more explosions, an increase of explosivity, more ash falling down to the close village and a lot of ash and some (volcanic) bombs falling down to the parking area and where the tourists used to witness the activity of the Yasur volcano."Sylvain Todman says the Department of Meteorology and Geohazards is closely monitoring the activity and will prepare a response plan if the volcano increases to alert level three.
