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Posts Tagged ‘Seismic Activity’

Puerto Rico, Gulf and Atlantic States — plate slippage soon

July 19, 2011 Comments off

New Force Driving Earth’s Tectonic Plates: ‘Hot Spots’ Of Plume From Deep Earth Could Propel Plate Motions Around Globe Discover Scripps Researchers

July 7, 2011 1 comment

nanopatentsandinnovations

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.

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

July 6, 2011 1 comment

thewatchers

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…

NASA Elenin 2011 Comet – Planetary Alignments with Comet Elenin Causing Big Earthquakes

July 5, 2011 10 comments

newsbad

USGS Worldwide Deadly and Destructive Earthquakes Between Magnitudes 6 and 8 Over Last 100 Years

earthquakes

NASA Elenin 2011 Comet – Planetary Alignments with Comet Elenin Causing Big Earthquakes Read more…

Is the Massive Puerto Rico Trench Awakening?

June 29, 2011 Comments off

www.zengardner.com

File:PRtrenchlocation.jpg

by Zen Gardner

“What Puerto Rico Trench?”  Exactly.

The arrows in the map above show the direction the underlying Caribbean tectonic plates are moving, with the resultant build-up of pressure releasing into a myrid of earthquakes in the region over the years. Puerto Rico is the smaller green island in the middle, with the Dominican Republic the larger island to the left. The string of other Caribbean islands is buried under the earthquake markers that Read more…

Indonesia Hit By Strong Earthquake, Latest On Ring Of Fire

June 27, 2011 Comments off

irishweatheronline

Ring of Fire pictured left with earthquakes from last 7 days (right). Quake data by earthquakes.tafoni.net

Ring of Fire pictured left with earthquakes from last 7 days (right). Quake data by earthquakes.tafoni.net

Indonesia was hit by a large earthquake and a series of strong tremors Sunday afternoon. A 6.5 magnitude quake, the latest in string of strong quakes to hit the Pacific Ring if Fire region during the last week, struck the country’s easternmost Province of Papua 1.16 p.m. GMT.

The quake was centred 53 kilometres (33 miles) northeast of Waren, a town on the northern coast of Papua island, according to Indonesia’s Meteorology and Geophysics Agency.  It was also felt in nearby Biak island, and Enarotali town on the main island The U.S. Geological Survey put the initial quake’s magnitude at 6.4.

The region was hit by at least moderate tremors in the following hours. The tremors measured 5.4 (x2), 5, 4.5 and 4.3 on the Richter Scale. There were no immediate reports of damage and no tsunami warning was issued.

Papua comprises most of the Read more…

Case Study: Tsunami in Seaside, Oregon

June 25, 2011 1 comment

carleton

Oregon Coast’s Vulnerability

tsunami map Recent research suggests that a Cascadia Subduction Zone earthquake could create tsunami waves that impact over 1,000-km of coastline in the U.S. and Canada. Source: USGS

The northwestern coast of Oregon is susceptible to both local and far-field tsunamis. The Cascadia Subduction Zone, where the eastward moving Juan de Fuca plate meets the westward moving North American Plate, is just off the Pacific Northwest coast of the United States and Canada. It is a 750-kilometer long fault zone. This area is very active tectonically, and therefore has the potential to produce large earthquakes and possibly, subsequent tsunamis. This subduction zone is thought to have last ruptured in 1700.

Additionally, far-field earthquakes throughout the Pacific are also capable of spawning tsunamis that could eventually reach the Oregon coast. Historical records show that since 1812, about 28 tsunamis with wave heights greater than one meter have reached the U.S. west coast. The March 1964 “Good Friday” earthquake created the most devastating of these tsunamis. The epicenter of this earthquake was near Anchorage, Alaska. The tsunami that followed this earthquake reached coasts all along the western U.S. within six hours. Cannon Beach, a small coastal community in northwestern Oregon was inundated during Read more…

Land splitting creates panic in Uttar Pradesh State of India

June 24, 2011 Comments off

thewatchers.adorraeli.com

Indian scientist in the United States has cautioned that mysterious long widespread cracks observed in several places in the Indo-Gangetic plains could be due to motion of a massive granitic body underneath. Ramesh Singh, who had extensively studied the seismology in that region, said in a statement as concern mounted over cracks being formed in several districts of Uttar Pradesh. “It is my sincere appeal to the government of India to monitor seismic activities in the area...

Indian scientist in the United States has cautioned that mysterious long widespread cracks observed in several places in the Indo-Gangetic plains could be due to motion of a massive granitic body underneath. Ramesh Singh, who had extensively studied the seismology in that region, said in a statement as concern mounted over cracks being formed in several districts of Uttar Pradesh.

It is my sincere appeal to the government of India to monitor seismic activities in the area before any major disaster takes place.” Ramesh Singh said.”If the orientations of such long cracks are in the east-west direction, then the cracks could be due to stress on the surface of the earth due to motion of this massive craton (granitic body) which is exposed near Jhansi.”

Singh, who was a senior professor at the Indian Institute of Technology Kanpur (IIT-K), is now Read more…

Tectonic plates rattle- more turbulence at the South Pole

June 21, 2011 Comments off

theextinctionprotocol

June 21, 2011ANTARCTICA – A 5.5 magnitude earthquake struck the South Sandwich Islands region, situated around 750km south east of South Georgia, in the South Atlantic early Sunday.  It was the latest in a series of quakes to hit the Antarctic Region during the past 24 hours. The moderate quake struck at 9.37am GMT at a depth of 137km and was centered 69 km (42 miles) NNW of Visokoi Island and 330 km (205 miles) NNW of Bristol Island. The last significant earthquake to be recorded in the South Sandwich Islands region occurred on Read more…

Number Of Recorded Earthquakes Rises Sharply

June 20, 2011 Comments off

irishweatheronline

Seismic chart showing 2011 Japan quake

Seismic chart showing 2011 Japan quake

2011 is on target to record the largest number of earthquakes in a single year for at least 12 years.

Research by Irish Weather Online, using data from the US Geological Survey (USGS), has found that earthquake activity (5.0-9.9 magnitude) from 01 January to 19 June 2011 is already exceeding the total annual seismic activity for the years 2001, 2002 and 2003.  2011’s total number of recorded earthquakes is also expected to exceed the most seismically active year of the past 12 years, 2007.

A total of 1,445 earthquakes, ranging in magnitude from 5.0 to 9.9, have been recorded in the year up to 19 June. The total number of earthquakes recorded globally for the entire of 2007 was 2,270.

The massive earthquakes in Japan (2011), Chile (2010), Sichuan (2008), Sumatra (2005 and 2008) and Indonesia (2004) have served to remind us of the devastating impact of earthquakes on life and property.  While the number of earthquakes ranging Read more…