Mikhailov, V. O. Volkova, M. S. Timoshkina, E. P. Shapiro, N. M. Smirnov, V. B.
Published in
Izvestiya, Physics of the Solid Earth
Abstract—The last activation of the Koryakskii volcano in 2008–2009 was accompanied by intense fumarolic and seismic activity. Volcanic activity peaked in March–April 2009 when ash plume rose to a height of 5.5 km and extended laterally over more than 600 km. To understand the dynamics of the volcanic processes and to forecast the further course of...
Einarsson, Páll Brandsdóttir, Bryndís
Published in
Frontiers in Earth Science
A half century of monitoring of the Northern Volcanic Zone of Iceland, a branch of the North America—Eurasia plate boundary, shows that the seismicity is very unevenly distributed, both in time and space. The four central volcanoes at the boundary, Þeistareykir, Krafla, Fremrinámar, and Askja, show persistent but very low-level seismicity, spatiall...
Bonaccorso, Alessandro Giampiccolo, Elisabetta
Published in
Frontiers in Earth Science
Dikes are the primary mechanisms to transport magma and feed eruptions. Investigations of the surface deformation and seismicity caused by a dike can potentially provide useful information to forecast the expected propagation and associated hazard. On December 24, 2018, a dike intrusion reached the summit of Mt. Etna, feeding an effusive fissure. T...
Trippanera, Daniele Ruch, Joël Passone, Luca Jónsson, Sigurjón
Published in
Frontiers in Earth Science
Dike intrusions produce faulting at the surface along with seismic swarms and possible eruptions. Understanding the geometry and kinematics of dike-induced fractures can provide relevant information on what controls magma emplacement and the associated hazards. Here, we focus on the Harrat Lunayyir volcanic field (western Saudi Arabia), where in 20...
Passarelli, Luigi Heryandoko, Nova Cesca, Simone Rivalta, Eleonora Rasmid, Rohadi, Supriyanto Dahm, Torsten Milkereit, Claus
Published in
Frontiers in Earth Science
Seismic swarms close to volcanoes often signal the onset of unrest. Establishing whether magma is the culprit and the unrest can be flagged as magmatic may be challenging. Here we analyze the spatio-temporal pattern of a seismic swarm that occurred in November 2015–February 2016 around Jailolo volcano, a long-dormant and poorly studied volcano loca...
Müller, Daniel Walter, Thomas R. Schöpa, Anne Witt, Tanja Steinke, Bastian Gudmundsson, Magnús T. Dürig, Tobias
Published in
Frontiers in Earth Science
Fissure eruptions are commonly linked to magma dikes at depth and are associated with elastic and inelastic surface deformation. Elastic deformation is well described by subsidence occurring above the dike plane and uplift and lateral widening occurring perpendicular to the dike plane. Inelastic deformation is associated with the formation of a gra...
Roman, Alberto Jaupart, Claude
International audience
Grandin, R. Socquet, A. Binet, R. Klinger, Y. Jacques, E. De Chabalier, Jean-Bernard King, G.C.P. Lasserre, C. Tait, S. Tapponnier, P.
...
We provide a new set of complementary geodetic data for the 2005 rifting event of Afar (Ethiopia). Interferometric synthetic aperture radar and subpixel correlations of synthetic aperture radar and SPOT images allow us to deduce 3-D surface displacement unambiguously. We determine the geometry of the dike and neighboring magma chambers and invert f...
Takahashi, Kana Seno, Tetsuzo
Published in
Earth, Planets and Space
We carry out numerical simulation of disturbance propagation within a plate floating over a viscous layer based on the 2-dimensional equations of Lehner et al. (1981). We apply the results to the anomalous crustal movements in central Honshu that followed the dike intrusion event between Miyakejima and Kozushima in the mid of 2000. We assume that t...
