Results 41 to 50 of about 1,236 (203)

The Unlocking Process Leading to the 2016 Central Italy Seismic Sequence

Geophysical Research Letters, 2023
Approximately 23,000 well‐located earthquakes from 2009 to 2016 are used as templates to recover seismic activity preceding the 2016 Central Italy seismic sequence.
M. Sugan, S. Campanella, L. Chiaraluce, M. Michele, A. Vuan   +4 more
doaj   +1 more source

Dynamics of the foreshock compressional boundary and its connection to foreshock cavities [PDF]

Journal of Geophysical Research: Space Physics, 2013
AbstractWe use several global hybrid (kinetic ions, fluid electrons) simulation runs for steady and time‐varying interplanetary magnetic field (IMF) conditions to examine the dynamics of the foreshock compressional boundary (FCB) and its connection to foreshock cavities.
N. Omidi, D. Sibeck, X. Blanco‐Cano, D. Rojas‐Castillo, D. Turner, H. Zhang, P. Kajdič   +6 more
openaire   +1 more source

Transmission of an ICME Sheath Into the Earth’s Magnetosheath and the Occurrence of Traveling Foreshocks [PDF]

, 2021
The transmission of a sheath region driven by an interplanetary coronal mass ejection into the Earth’s magnetosheath is studied by investigating in situ magnetic field measurements upstream and downstream of the bow shock during an ICME sheath passage on
Simon W. Good, Yordanova, Emiliya,, Turc, Lucile,, Lucile Turc, Turc, Lucile, Good, Simon W., Pulkkinen, Tuija I.,, Good, Simon W.,, Ala-Lahti, Matti, Dimmock, Andrew P., Yordanova, Emilya, University, Aalto, Dimmock, Andrew P.,, Kilpua, Emilia K. J.,, Andrew P. Dimmock, Emilya Yordanova, Ala-Lahti, Matti,, Pulkkinen, Tuija I., Kilpua, Emilia K. J., Matti Ala‐Lahti, Kilpua, Emilia K.J., Tuija I. Pulkkinen, Emilia K. J. Kilpua   +22 more
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Observations of a new foreshock region upstream of a foreshock bubble's shock [PDF]

Geophysical Research Letters, 2016
AbstractEarth's foreshock is a region within the solar wind upstream of Earth's bow shock filled with backstreaming solar wind particles reflected at the shock. Within this region, when the interplanetary field is approximately radial, foreshock bubbles (FBs) can be formed when the backstreaming particles interact with approaching discontinuities ...
Terry Z. Liu, Heli Hietala, Vassilis Angelopoulos, Drew L. Turner   +3 more
openaire   +2 more sources

Regional Characteristics of Observable Foreshocks

, 2022
Measures of foreshock occurrence are systematically examined using earthquake catalogs for eight regions (Italy, southern California, northern California, Costa Rica, Onshore Japan, Alaska, Turkey, and Greece) after imposing a magnitude ≥ 3.0 ...
Lay, Thorne, Brodsky, Emily, Chaves, Esteban, Wetzler, Nadav, Goebel, Thomas, Brodsky, Emily E., Goebel, Thomas H.W., Chaves, Esteban J.   +7 more
core   +1 more source

Near-seismic effects in ULF fields and seismo-acoustic emission: statistics and explanation [PDF]

Natural Hazards and Earth System Sciences, 2005
Preseismic intensification of fracturing has been investigated from occurrence analysis of seismo-acoustic pulses (SA foreshocks) and ULF magnetic pulses (ULF foreshocks) observed in Karimshino station in addition to seismic foreshocks.
O. Molchanov, A. Schekotov, M. Solovieva, E. Fedorov, V. Gladyshev, E. Gordeev, V. Chebrov, D. Saltykov, V. I. Sinitsin, K. Hattori, M. Hayakawa   +10 more
doaj  

Temporal Variations of Earthquake Magnitude‐Frequency Relation in the Source Area of M ≥ 6.0 Earthquakes: A Systematic Survey in Taiwan

Earth and Space Science, 2023
Recent studies in the earthquake magnitude‐frequency relation (b‐value) found that the b‐value can decrease with time before large earthquakes in the source area.
Sean Kuanhsiang Chen, Po‐Yuan Chen, Yih‐Min Wu, Chien‐Chih Chen, Chung‐Han Chan   +4 more
doaj   +1 more source

On the relevance of the foreshocks in forecasting seismic mainshocks

, 2023
We analyze the usefulness of the foreshocks in forecasting seismic mainshocks. The analysis is based on possible correlations which may exist between foreshocks and mainshocks.
Apostol, Bogdan, Cune, Liviu Cristian
core   +1 more source

Pervasive Foreshock Activity Across Southern California

Geophysical Research Letters, 2019
Foreshocks have been documented as preceding less than half of all mainshock earthquakes. These observations are difficult to reconcile with laboratory earthquake experiments and theoretical models of earthquake nucleation, which both suggest that ...
Daniel T. Trugman, Zachary E. Ross
doaj   +1 more source

Precursory slow slip and foreshocks on rough faults

, 2020
Foreshocks are not uncommon prior to large earthquakes, but their physical mechanism controversial. Two interpretations have been put forward: 1. foreshocks are driven by aseismic nucleation; 2.
Camilla Cattania, Paul Segall
core   +1 more source