Location and Mechanism of Very Long Period Tremor During the 2008 Eruption of Okmok Volcano from Interstation Arrival Times
نویسندگان
چکیده
منابع مشابه
Post-Eruptive Inflation of Okmok Volcano, Alaska, from InSAR, 2008-2014
Okmok, a ~10-km wide caldera that occupies most of the northeastern end of Umnak Island, is one of the most active volcanoes in the Aleutian arc. The most recent eruption at Okmok during July–August 2008 was by far its largest and most explosive since at least the early 19th century. We investigate post-eruptive magma supply and storage at the volcano during 2008–2014 by analyzing all available...
متن کاملNonlinear estimation of geometric parameters in FEMs of volcano deformation: Integrating tomography models and geodetic data for Okmok volcano, Alaska
[1] The internal structure, loading processes, and effective boundary conditions of a volcano control the deformation observed at the Earth’s surface. Using finite element models (FEMs), we simulate the response due to a pressurized magma chamber embedded in a domain having a distribution of elastic material properties. We present the Pinned Mesh Perturbation method (PMP) to automate the mesh g...
متن کاملGround surface deformation patterns , magma supply , and magma storage at Okmok volcano , Alaska , from InSAR analysis : 2 . Coeruptive deflation , July – August 2008
[1] A hydrovolcanic eruption near Cone D on the floor of Okmok caldera, Alaska, began on 12 July 2008 and continued until late August 2008. The eruption was preceded by inflation of a magma reservoir located beneath the center of the caldera and ∼3 km below sea level (bsl), which began immediately after Okmok’s previous eruption in 1997. In this paper we use data from several radar satellites a...
متن کاملGround surface deformation patterns , magma supply , and magma storage at Okmok volcano , Alaska , from InSAR analysis : 1 . Intereruption deformation , 1997 – 2008
[1] Starting soon after the 1997 eruption at Okmok volcano and continuing until the start of the 2008 eruption, magma accumulated in a storage zone centered ∼3.5 km beneath the caldera floor at a rate that varied with time. A Mogi‐type point pressure source or finite sphere with a radius of 1 km provides an adequate fit to the deformation field portrayed in time‐sequential interferometric synth...
متن کاملLava volume from the 1997 Eruption of Okmok volcano, Alaska, estimated using spaceborne and airborne interferometric synthetic aperture radar
Interferometric synthetic aperture radar (InSAR) techniques are used to calculate the volume of eruption at Okmok volcano, Alaska by constructing precise digital elevation models (DEMs) that represent volcano topography before and after the eruption. The pre-eruption DEM is generated using TOPSAR data where a three-dimensional multiaffined transformation is used to account for the misalignments...
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