First posted May 11, 2023 For additional information, contact: Alaska Volcano ObservatoryU.S. Geological Survey4210 University DriveAnchorage, AK 99508 The Observatory responded to eruptions, volcanic unrest or suspected unrest, increased seismicity, and other significant activity at 17 centers in 2019. most notable was an eruption of Shishaldin Volcano, featuring eruptive that produced lava fl...

The analysis of the seismicity catalog (1996 to 2019) covering region from Jura mountains Corsica provides a first-order image distribution earthquakes, highlighting large structures such as Briançonnais and Piedmontais seismic arcs, eastward deepening focal depths through Western Alps, several active faults (e.g. Belledonne, Middle Durance, Ligure). Over this period magnitudes are moderate mec...

Geodetic and seismologic studies support a tectonic model for the central Himalaya wherein ~2 cm/yr of Indo-Asian convergence is accommodated along the primary décollement under the range, the Main Himalayan thrust. A steeper midcrustal ramp in the Main Himalayan thrust is commonly invoked as driving rapid rock uplift along a range-parallel band in the Greater Himalaya. This tectonic model, dev...

Heterogeneous network computing enables the development of a single complex application using a distributed network of possibly dissimilar machines. While heterogeneous networks promise cost-eeective compute cycles, almost no software is available to aid in the design and implementation of their applications. In this paper, we couple the Zoom representation, designed to facilitate development o...

Following the 2002 M 7.9 Denali fault earthquake, clear changes in geyser activity and a series of local earthquake swarms were observed in the Yellowstone National Park area, despite the large distance of 3100 km from the epicenter. Several geysers altered their eruption frequency within hours after the arrival of large-amplitude surface waves from the Denali fault earthquake. In addition, ear...

This work focuses on the seismic response of a volcano to different magmatic processes with the aim of sheding light on their driving physics as tracked by seismicity. We study seismic time series recorded at basaltic volcanoes and identify generic seismicity patterns characteristic of (i) inter-eruptive, (ii) reservoir feeding, (iii) reservoir leak, and (iv) dyke injection phases of volcanic a...

this paper presents the seismicity and seismotectonic characteristics of esfahan and adjoining regions, an area bounded between 49.5-54o e and 31-34.1o n. according to mirzaei et al. (1998) this region is placed between two major seismotectonic provinces: zagros and central-east iran. the boundary between these two provinces is known to be the main zagros reverse fault. geological maps with sca...

[1] The relationship between small-magnitude seismicity and large-scale crustal faulting along the Hayward Fault, California, is investigated using a double-difference (DD) earthquake location algorithm. We used the DD method to determine high-resolution hypocenter locations of the seismicity that occurred between 1967 and 1998. The DD technique incorporates catalog travel time data and relativ...

Pozzuoli is located at the center of the Campi Flegrei caldera, near Naples and is famous for its anomalous subsidence and upheaval documented since the Roman period. Its secular and gradual subsidence can be interpreted as self-loading compaction of the caldera fills while abrupt upheavals are geologically suspected to be caused by magmagenic movements or steam forces. In order to interpret th...