Earth Imaging Journal: Remote Sensing, Satellite Images, Satellite Imagery
Breaking News
Contex Expands the IQ Quattro Family with the New 36-inch Wide Format Scanner
Chantilly, VA — Contex, the leader of wide format...
OGC is Calling for Sponsors for an Innovative Interoperability Initiative, Testbed 14
The Open Geospatial Consortium (OGC®) has issued a call...
GIS-Pro 2017 Conference Details Announced
Des Plaines, IL - URISA is pleased to announce...
SpatialTEQ Inc. Releases Map Business Online 5.0 – Advanced Territory Mapping
CORNISH, Maine - SpatialTEQ Inc., publisher of North America's fastest...
The Geological Remote Sensing Group Makes 2017 Student Awards Across the Globe
Guildford, UK, May 2017: After receiving numerous and high quality...

A model of vertical movement across Santorini from January 2011 to the present was derived from Envisat and TerraSAR-X data. During the last year and a half, parts of Santorini have risen about 14 cm. Scientists believe new molten rock has been squeezing up beneath the volcano at a depth of about 4 km, pictured here as a red dot.

The south Aegean Sea islands of Santorini are showing signs of unrest for the first time in more than half a century. Satellite data confirm they’ve risen about 14 cm since January 2011.

To map the movement, the scientists used radar data from the European Space Agency’s Envisat satellite from March to December 2011 and from the German TerraSAR-X mission from July 2011 to April 2012.

To ensure accurate measurement, the team also used Global Positioning System receivers and an island-wide network of triangulation stations. The study outlines that the total amount of vertical movement is now approaching 8–14 cm at some points on the Kameni islands, and the whole caldera is around 14 cm wider now than it was at the beginning of 2011.

The Santorini volcano’s last major explosive eruption was about 3,600 years ago. This event formed a large crater, or caldera, which is now flooded by the sea. For the past 2,000 years, Santorini has shown different behaviour patterns, with small eruptions of lava every few tens or hundreds of years, slowly building a new volcanic edifice from the sea floor.

The Kameni islands, which lie in the middle of Santorini’s large flooded crater, form the top of this youngest part of the volcano. The last eruption of the Kameni islands was in 1950. For the next 60 years, Santorini was quiet.

In January 2011, a series of small earthquakes began beneath the islands. Most were small enough that they could only be detected with sensitive seismometers, but several were felt by the local residents.

Image courtesy of  M. Parks

Read the full story.

Comments are closed.