Navigation Links
Nea Kameni volcano movement captured by Envisat
Date:5/22/2012

Archived data from the Envisat satellite show that the volcanic island of Santorini has recently displayed signs of unrest. Even after the end of its mission, Envisat information continues to be exploited for the long-term monitoring of volcanoes.

Santorini is a picturesque Greek island in the south Aegean Sea and the most active volcanic centre in the South Aegean Volcanic Arc. The island is the site of one of history's largest volcanic eruptions, about 3600 years ago. The geological record over the past million years reveals an extensive history of eruptions, with the most recent occurring in 1950.

But despite being dormant for over half a century, satellites have detected slight movements.

These and other findings were presented at the International Forum on Satellite Earth Observation for Geohazard Risk Management, currently under way in Santorini itself.

Organised by ESA in partnership with the Group on Earth Observations (GEO), the forum is focusing on the science and applications of satellite Earth observation to support the management of risks associated with geophysical hazards.

Seismic activity in Santorini, such as the underground movement of magma, from January 2011 to today has caused ground deformation that was detected by Envisat's radar.

Even from an orbit about 800 km above the ground, deformations of a few centimetres can be detected by satellite radars.

When two or more radar images of the same area are combined, changes in signal reflections between them can be measured. This technique called Differential Interferometric Synthetic Aperture Radar or DInSAR has become a useful tool for detecting ground deformation.

Envisat shows that the northeastern part of Santorini's Nea Kameni volcano experienced an uplift of about 5 cm in 2011, while other areas of the volcano rose some 3 cm.

"Monitoring to detect any change of the status of the volcano presents a further step towards the understanding of physical processes related to volcanic eruptions that can lead to natural disasters," said Prof. Issaak Parcharidis from the Department of Geography at the Harokopio University of Athens.

During the first months of this year, Santorini saw a drop in the speed of deformation, accompanied by a reduction in seismic activity.

"After evaluation of local seismic activity, deformation and physicochemical changes, [we] concluded that during the last months the volcano presents a very limited activity, much lower than that of 2011," said Prof. Kosmas Stylianidis, Head of the Special Scientific Committee for the Monitoring of Santorini Volcano.

"The Committee, in its monthly report of April to the government, advises the application of no restrictive measure concerning the mobility of population."

Contact with Envisat was lost on 8 April, but ten years of archived data from the mission will continue to be used by scientists for monitoring volcanoes and many other studies.

The continuation of observation from coming satellite missions, such as the family of Sentinels under Europe's Global Monitoring for Environment and Security programme, is crucial for ensuring data flow to scientists and operational users dealing with hazard and risk assessment.


'/>"/>
Contact: Robert Meisner
robert.meisner@esa.int
European Space Agency
Source:Eurekalert

Related biology news :

1. Volcanoes may have provided sparks and chemistry for first life
2. Scientists map soils on an extinct American volcano
3. Study compares sound from exploding volcanoes with jet engines
4. Rosetta Stone of supervolcanoes discovered in Italian Alps
5. Volcanoes played pivotal role in ancient ice age, mass extinction
6. Supervolcano eruption -- in Sumatra -- deforested India 73,000 years ago
7. Volcano monitoring will target hazard threat to Marianas, US military and commercial jets
8. Expedition heads for worlds deepest undersea volcanoes
9. Terra Satellite sees Iceland volcanos ash moving into Germany
10. Volcano fuels massive phytoplankton bloom
11. Novel ash analysis validates volcano no-fly zones
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/22/2016)... , January 22, 2016 ... the addition of the  "Global Behavioral ... offering. --> http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) ... "Global Behavioral Biometric Market 2016-2020"  report ... Research and Markets ( http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has ...
(Date:1/20/2016)... Jan. 20, 2016  Synaptics Incorporated (NASDAQ: ... solutions, today announced sampling of S1423, its newest ... and small screen applications including smartwatches, fitness trackers, ... round and rectangular shapes, as well as thick ... with moisture on screen, while wearing gloves, and ...
(Date:1/11/2016)... , Jan. 11, 2016 Synaptics Incorporated ... interface solutions, today announced that its ClearPad ® ... (TDDI) products won two separate categories in the 8 ... Innovator and Best Technology Breakthrough. The Synaptics ® ... a simplified supply chain, thinner devices, brighter displays and ...
Breaking Biology News(10 mins):
(Date:2/11/2016)... New York, NY (PRWEB) , ... ... ... International (BPI), a business-to-business publication dedicated to delivering cutting-edge information focused on ... GE Healthcare Life Sciences to become a premier sponsor of the 2016 ...
(Date:2/11/2016)... WASHINGTON , Feb. 11, 2016   BioInformant ... strategic report, "Stem Cell Research Products, Opportunities, Tools, and ... 2020. ... specialize in the stem cell industry, BioInformant has more ... of the stem cell market, by stem cell type. ...
(Date:2/11/2016)... ... , ... Global Stem Cells Group, has announced ... new facility will provide advanced protocols and state-of-the-art techniques in cellular medicine, focusing ... The new GSCG clinic is headed by four prominent Ecuadorian physicians, including Pablo ...
(Date:2/10/2016)... -- The Maryland House of Delegates and House Speaker ... Maryland School of Medicine Dean E. Albert Reece ... System President and CEO Robert Chrencik , MBA, ... given to the public by the leader of the ... and Mr. Chrencik for their contributions to our statewide ...
Breaking Biology Technology: