Archive
Ring of Fire: Update
Labor market risks of a magnitude 7.8 earthquake in southern California
PDF file of this Regional Report | Other BLS Regional Reports
Authors:
Richard Holden, Amar Mann, and Tian Luo
Bureau of Labor Statistics Read more…
Mount Etna Volcano Erupts
Mount Etna in Sicily, Italy, erupted on Tuesday night resulting in the closure of the island’s main airport at Catania.
This is the sixth time that Mount Etna, which is popular among tourists, has erupted in 2011.
The last eruption occurred on Saturday. Italian officials had since said the 11,000-foot-tall volcano, one of the most active volcanoes in the world, had calmed down after a week of activity.
Residents in surrounding areas had been warned however, that the Sicilian volcano might have fallen back into a short-lived slumber and Read more…
Global Earthquake And Volcano Overview: Phenomenal Worldwide UPTICK Continues
VIDEO: Bulging crater on Hawaii volcano mesmerizing portent
This Quicktime movie shows a timelapse sequence taken from a thermal camera on the rim of Pu`u `Ō `ō crater. The movie spans from May 26 to today and shows the rising level of the lava lake in the crater. In the first part of the movie, covering most of June, the level of the lava lake rises primarily due to overflows building the steep levee walls higher. In the last portion of the movie, from about July 1 to today, much of the rise of the lava lake has been due to uplift of the crater floor, carrying the lava lake upward. This uplift has been especially pronounced over the past few days, shown by the final few moments of the movie. The temperature scale is in degrees Celsius.
Video courtesy USGS Hawaiian Volcano Observatory
The bulging Pu`u `Ō `ō crater on the east rift zone of Hawaii’s Kilauea volcano is putting on a show, and there is no telling what could be next.
This USGS Hawaiian Volcano Observatory video shows a timelapse sequence taken from a thermal camera on the rim of Pu`u `Ō `ō crater.
The movie spans from May 26 to today and shows the rising level of the lava lake in the crater.
Things appear to be going slow in the first part of the movie, which shows the eruption during the month of June. You can see the level of the lava lake rises primarily due to overflows building the steep levee walls higher.
Scientists say sources within Pu`u `O`o crater are feeding that lava lake.
But its in the last portion of the movie where things get really interesting. From Read more…
Study: Volcanoes can trigger bigger climate impact
Volcanic eruptions might affect earth’s climate by releasing far more weather-altering particles than scientists have suspected previously, a new study has found.
A team of researchers, who wanted to find out the influence of volcanoes on global climate, investigated the huge eruption of the Eyjafjallajokull volcano in Iceland on March 20, 2010.
From a research station in France, they monitored the volcano’s eruption, which rapidly ejected large ash particles into the atmosphere and spread all over Europe. They then analysed how many secondary particles this ash generated upon reacting chemically with Read more…
Underwater Antarctic Volcano Chain Discovered In The Southern Ocean
Scientists from British Antarctic Survey (BAS) have discovered previously unknown volcanoes in the ocean waters around the remote South Sandwich Islands. Using ship-borne sea-floor mapping technology during research cruises onboard the RRS James Clark Ross, the scientists found 12 volcanoes beneath the sea surface – some up to 3km high. They found 5km diameter craters left by collapsing volcanoes and 7 active volcanoes visible above the sea as a chain of islands.Sea-floor mapping technology reveals volcanoes beneath the sea surface Read more…Mount Etna eruption closes airports and ‘knocks clocks 15 minutes fast’
An eruption by Mount Etna on the Italian island of Sicily left a nearby airport closed and … locals turning up early for work.
The volcano spewed lava on to its south-eastern slopes on Saturday afternoon and winds swept ash further afield, stopping flights at Catania’s Fontanarossa airport.
The strong eruption – Etna’s fifth since the beginning of the year – was shortlived, but left the airport closed overnight.
Strong: An eruption on Mount Etna spews ash and lava Read more…New Force Driving Earth’s Tectonic Plates: ‘Hot Spots’ Of Plume From Deep Earth Could Propel Plate Motions Around Globe Discover Scripps Researchers
Bringing fresh insight into long-standing debates about how powerful geological forces shape the planet, from earthquake ruptures to mountain formations, scientists at Scripps Institution of Oceanography at UC San Diego have identified a new mechanism driving Earth’s massive tectonic plates.
Reconstruction of the Indo-Atlantic Ocean 63 million years ago, during the time of the superfast motion of India which Scripps scientists attribute to the force of the Reunion plume head. The arrows show the relative convergence rate of Africa (black arrows) and India (dark blue) relative to Eurasia before, during and after (from left to right) the period of maximum plume head force. The jagged red and brown lines northeast of India show two possible positions of the trench (the subduction zone) between India and Eurasia depending on whether the India-Eurasia collision occurred 52 million years ago or 43 million years ago.
Credit: Scripps Institution of Oceanography
Scientists who study tectonic motions have known for decades that the ongoing “pull” and “push” movements of the plates are responsible for sculpting continental features around the planet. Volcanoes, for example, are generally located at areas where plates are moving apart or coming together. Scripps scientists Steve Cande and Dave Stegman have now discovered a new force that drives plate tectonics: Plumes of hot magma pushing up from Earth’s deep interior. Their research is published in the July 7 issue of the journal Nature.
Using analytical methods to track plate motions through Earth’s history, Cande and Stegman’s research provides Read more…
Scientists warn volcanoes in Australia are due to erupt
Scientists are now warning that volcanoes in Western Victoria and South Australia are due to erupt. The prediction comes just hours after two earthquakes hit the state this morning.
Using new dating techniques, University of Melbourne scientists have found that the volcanoes usually erupt every 2000 years, with the last eruption at Mt Gambier, South Australia, 5000 years ago. It comes as Victorians are warned to brace themselves for more tremors after a shallow magnitude quake hit at 11.32am, sending shockwaves through towns and suburbs more than 100 kilometres away. A series of tremors lasting up to 15 seconds have been felt across Melbourne’s CBD and southeastern suburbs. A second, smaller quake shook Korumburra, with reports it was again felt in Melbourne, at 12.37pm
Some Victorians say their houses shook violently for about 10 seconds, and many reported hearing the earth rumble. Experts say the quake struck 8 kilometres underground, and said the epicentre was about 7km west of Korumburra. So far, there are no reports of any major damage, except hairline cracks in some peoples’ homes. The area in Gippsland is prone to Read more…
Soputan volcano eruption Sulawesi, Indonesia : subsiding activity tonight
Volcanic smoke billows from Mount Soputan as seen in this photo taken from the town of Amurang, North Sulawesi, Indonesia, Monday, Oct. 6, 2008. (AP Photo)VAAC Ash advisory for the area : The ash cloud from the initial explosion/eruption is drifting further to the south-west. The image confirms the subsiding activity of the volcano. Click on the picture to go straight to the VAAC page in Darwin, Australia. The report below dates from 14:22 UTC on July 3, 2011.
The sector most affected for the coming hours will be Kalimantan (Borneo), Indonesia.
VAAC comments on this latest report : HIGH LEVEL ERUPTION HAS CEASED AND IS DISSIPATING. LOW LEVEL VA NOT IDENTIFIABLE ON SAT IMAGERY DUE TO METEOROLOGICAL CLOUD BUT EXPECTED TO STILL BE IN AREA.
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