Eruptions from Pavlof Volcano continued on Wednesday after rumbling to life earlier in the week. The 8,261-foot peak on the Alaska Peninsula awoke Monday morning, kicking off a "low-level eruption of lava," according to the Alaska Volcano Observatory (AVO). Sitting about 30 miles northeast of the community of King Cove, Pavlof is a frequently-active volcano that last erupted in 2007. The volcano's rumbling has strengthened this week. At about noon Tuesday, satellite images showed a lava flow had coursed a third of a mile down the northern side of the volcano.
By late Tuesday, an ash plume extended 15,000 feet above sea level, moving downwind to the northeast for up to 100 miles before dispersing. The National Weather Service issued a "Significant Meterological Event" warning, called a SIGMET, to alert pilots of hazardous conditions in the area. Pavlof continued to rumble Wednesday, with one pilot reporting a dark ash cloud reaching 20,000 feet. Residents of Cold Bay, located 37 miles southwest of the volcano, observed incandescent glow at the summit during the night. Pilot reports and photographs from yesterday afternoon indicate that the lava flow extending down the northwest flank is still active and has generated debris-laden flow deposits, presumably from interaction of hot lava with the snow and ice on the flank.

Scientists say small lava flows have been detected on two restless volcanoes in Alaska. The Alaska Volcano Observatory says satellite images on Tuesday show the lava partly down a flank of Pavlof Volcano in a low-level eruption, 625 miles southwest of Anchorage.

Geophysicist Dave Schneider says minor steam and ash emissions are visible from the community of Cold Bay 37 miles away. Pavlof is the second Alaska volcano to erupt this month. Cleveland Volcano, on an uninhabited island in the Aleutian Islands, experienced a low-level eruption in early May.

U.S. Forest Service Geologist Jim Baichtal, who is based on Prince of Wales Island, and Anchorage geologist Sue Karl were looking at some hydrographic surveys, something geologists tend to do. When we were done, I noticed the area from Thorne Arm to Rudyerd had been surveyed," Baichtal said. "I zoomed in and there was this large... some kind of volcano, and two other dome-like structures." Karl added that, "This new NOAA survey allowed us to see things that people had never seen before." Karl said a modern example of a similar eruption is Surtsey, a volcanic island in Iceland, which erupted from the sea floor in the 1960s, building itself up and eventually breaching the surface to form the island. Karl points out that when the newly discovered volcano erupted, sea levels also were lower than they are now, but even with that, "We still have too much depth. We have to call on glacial loading and rebound."

A flurry of earthquakes continues across the planet over the past 72 hours, showing few signs of abatement. Seismic tension continues to build across the Pacific Plate, the Cocos plate (Central America), and the Nazca plate, near South America. Tectonic plate agitation appears to be increasing, along with volcanic pressures under many of the world's major volcanoes.

Mexico's giant Popocatepetl volcano may generate lava flows, explosions of "growing intensity" and ash that could reach miles away, the National Center for Disaster Prevention said Monday. Officials were preparing evacuation routes and shelters for thousands of people who live in the shadow of Popocatepetl, located 40 miles southeast of Mexico City. Officials have created a 7.5-mile restricted zone around the cone of the volcano. Popo, as the volcano is known, has displayed a "notable increase in activity levels" in the last few days, including tremors and explosive eruptions, according to a statement from the federal government. The 17,887-foot volcano has been disgorging large towers of steam and ash since mid-April, but officials have become more concerned in recent days as activity has intensified. Webcams have shown large chunks of molten rock spewing from the crater, and ash has rained down on the nearby city of Puebla. On Sunday, the National Center for Disaster Prevention elevated its warning level to Yellow Phase 3, the fifth stage of a seven-stage warning scale.
At the next stage, Red Phase 1, a voluntary evacuation order would be issued for residents of nearby villages. Then, in a familiar ritual, bells would ring in town squares, residents would gather with their identification papers in plastic bags, and police and soldiers would offer to move them to safety. Popocatepetl, which means "smoking mountain" in the Aztec language Nahuatl, dominates much of the landscape in central Mexico, along with its nearby "twin" volcano, the dormant Iztaccihuatl. Popo was dormant for decades until 1994, when it began to stir. There have been moderate outbursts from Popo in recent years, forcing the government to evacuate as many as 75,000 people at a time. The government for the state of Puebla has already sent hundreds of police to three of the most vulnerable villages, where 11,000 people could be affected. Shelters have been set up and stocked with food, water and clothes. We're ready for any emergency," said Lidia Carrillo, a spokeswoman for the state.

Another volcano in Alaska is heating up, with seismic instruments signaling a possible eruption. The Alaska Volcano Observatory says tremors were detected Monday at Pavlof Volcano 1,000 km southwest of Anchorage. John Power, the US Geological Survey scientist in charge at the observatory, said satellite imagery shows the volcano is "very, very hot." Pavlof is 60km from the community of Cold Bay. The volcano last erupted in 2007. It's the second Alaska volcano to rumble this month. Cleveland Volcano, on an uninhabited island in the Aleutian Islands, experienced a low-level eruption in early May. Power said satellite imagery shows the volcano continues to discharge steam, gas and heat, although no ash clouds have been detected in the past week. Cleveland is not monitored with seismic instruments. - News 24

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.

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...

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.

Cleveland Volcano is erupting once again. Three small explosions shook the volcano Saturday morning, and a low-level eruption is ongoing.

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.