Inflation/deflation sequence on the Nisyros active volcano, Greece, during the period 1995-2000 issued from SAR differential interferometry

Olga Sykioti; Charalabos C. Kontoes; Panagiotis Elias; Pierre Briole; Maria Sachpazi; Dimitris Paradissis; Ioannis Kotsis

doi:10.1117/12.463490

14 March 2003 Inflation/deflation sequence on the Nisyros active volcano, Greece, during 1995-2000 issued from SAR differential interferometry

Olga Sykioti, Charalabos C. Kontoes, Panagiotis Elias, Pierre Briole, Maria Sachpazi, Dimitris Paradissis, Ioannis Kotsis

Author Affiliations +

Proceedings Volume 4886, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology II; (2003) https://doi.org/10.1117/12.463490
Event: International Symposium on Remote Sensing, 2002, Crete, Greece

Abstract

Nisyros is a poorly known Quarternary volcano, south-east of the Agean volcanic arc. It is characterized by periods of intense seismic activity and paucity in reruptive episodes, sometimes accompanied by hydrothermal explosions. The most recent unrest episode lasted from 1995 to 1998, without eruption. Radar interferometry has been applied in order to study the evolution of the deformation from 1995 to 2000. Observations show a continuous uplift of 140mm during 1995-1997. At mid 1998, the movement trend changes into a slower surface deflation til 2000. Maximum crust deformation is constantly observed at the north-west part of the island, where most earthquake epicenters are located and in agreement to three GPS campaigns conducted between mid 1997 and mid 1998. We solve for the best-fit Mogi point source and best-fit Okada rectangular dislocation of the observed deformation field. Mogi model indicates a source at 5km depth beneath the north-west edge of the island, with a maximum deformation amplitude at surface of 0.14 plus or minus 0.02m and a total volume change of 26 plus or minus 4 × 10⁶ m³, during 1995-1997. The Okada model indicats a dike solution 2km long, 2.2km wide, wiht a 4m opening and a 30° dip. The upper center is at 6.4km depth and the volume change, also during 1995-1997, is 17.6 × 10⁶ m³. Each solution is discussed on the potential controlling mechanism resulting to the volcano's inflation/deflation sequence.

Citation Download Citation

Olga Sykioti, Charalabos C. Kontoes, Panagiotis Elias, Pierre Briole, Maria Sachpazi, Dimitris Paradissis, and Ioannis Kotsis "Inflation/deflation sequence on the Nisyros active volcano, Greece, during 1995-2000 issued from SAR differential interferometry", Proc. SPIE 4886, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology II, (14 March 2003); https://doi.org/10.1117/12.463490

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available