Short-Term Foreshocks as Key Information for Mainshock Timing and Rupture: The Mw6.8 25 October 2018 Zakynthos Earthquake, Hellenic Subduction Zone [PDF]
Sensors, 2020 Significant seismicity anomalies preceded the 25 October 2018 mainshock (Mw = 6.8), NW Hellenic Arc: a transient intermediate-term (~2 yrs) swarm and a short-term (last 6 months) cluster with typical time-size-space foreshock patterns: activity increase,
Gerassimos A. Papadopoulos +4 more
doaj +3 more sources
Traveling Foreshocks and Transient Foreshock Phenomena [PDF]
Journal of Geophysical Research: Space Physics, 2017 AbstractWe use the multispacecraft capabilities of the Cluster and Time History of Events and Macroscale Interactions during Substorms (THEMIS) missions to show that two types of foreshock may be detected in spacecraft data. One is the global foreshock that appears upstream of the Earth's quasi‐parallel bow shock under steady or variable interplanetary
Xóchitl Blanco-Cano +2 more
exaly +4 more sources
Seismic and Aseismic Fault Slip During the Initiation Phase of the 2017 MW = 6.9 Valparaíso Earthquake [PDF]
Geophysical Research Letters, 2021 Transient deformation associated with foreshocks activity has been observed before large earthquakes, suggesting the occurrence of a detectable preseismic slow slip during the initiation phase.
Emmanuel Caballero +5 more
doaj +2 more sources
ARTEMIS Observations of Foreshock Transients in the Midtail Foreshock
Geophysical Research Letters, 2020 AbstractForeshock transients such as hot flow anomalies (HFAs) are frequently observed in the dayside foreshock. They can disturb the local bow shock, magnetopause, and consequently the magnetosphere‐ionosphere system through dynamic pressure perturbations. Recent multipoint observations found that such perturbations can even propagate from the dayside
Hui Zhang +2 more
exaly +2 more sources
On catching the preparatory phase of damaging earthquakes: an example from central Italy [PDF]
Scientific Reports, 2023 How, when and where large earthquakes are generated remain fundamental unsolved scientific questions. Intercepting when a fault system starts deviating from its steady behavior by monitoring the spatio-temporal evolution and dynamic source properties of ...
Matteo Picozzi +3 more
doaj +2 more sources
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 ...
Zachary E. Ross, Daniel T. Trugman
exaly +2 more sources
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.
Hui Zhang +2 more
exaly +2 more sources
Foreshock properties illuminate nucleation processes of slow and fast laboratory earthquakes [PDF]
Nature Communications, 2023 Understanding the connection between seismic activity and the earthquake nucleation process is a fundamental goal in earthquake seismology with important implications for earthquake early warning systems and forecasting.
David C. Bolton +3 more
doaj +2 more sources
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 ...
Vassilis Angelopoulos +2 more
exaly +3 more sources
On the Statistical Significance of Foreshock Sequences in Southern California
Geophysical Research Letters, 2020 Earthquake foreshocks may provide information that is critical to short‐term earthquake forecasting. However, foreshocks are far from ubiquitously observed, which makes the interpretation of ongoing seismic sequences problematic.
Martijn van den Ende, Jean Paul Ampuero
exaly +2 more sources