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Latest Philippine earthquake reveals tectonic complexity


Latest Philippine earthquake reveals tectonic complexity
Posted on
 
Mario Aurelio, Director of the University of the Philippines National Institute of Geological Sciences,
Mahar Lagmay, Executive Director, University of the Philippines Resilience Institute-Nationwide Operational Assessment of Hazards Center (@nababaha),
John Agustin Escudero, Structural Geology and Tectonics Laboratory at the University of Philippines National Institute of Geological Sciences,
Sandra Catugas, Structural Geology and Tectonics Laboratory at the University of Philippines National Institute of Geological Sciences
 
Citation: Aurelio, M., Lagmay, M., Escudero, J. A., and Catugas, S., 2021, Latest Philippine earthquake reveals tectonic complexity, Temblor, http://doi.org/10.32858/temblor.191
 
A magnitude-6.6 earthquake struck the island of Luzon, Philippines, at 4:47 a.m. local time on Saturday, July 24 (data from the Philippine Institute of Volcanolog ....

New Zealand , United States , United Kingdom , Davao City , Philippine Sea , Oceans General , Taal Volcano , Batangas City , Mindoro Occidental , North Cotabato , Sandra Catugas , Sophia Ulysse , Le Pichon , Mahar Lagmay , John Agustin Escudero , Mario Aurelio , Tectonics Laboratory , Seismological Research Letters , Geophysical Journal International , University Of The Philippines Resilience Institute , National Capital Region Of The Philippines , National Earthquake Information Center , College Of Science The University , Seismology At School , United States Geological , National Disaster Risk Reduction Management Council ,

Frontiers | Systematic Triggering of Large Earthquakes by Karst Water Recharge: Statistical Evidence in Northeastern Italy


Systematic Triggering of Large Earthquakes by Karst Water Recharge: Statistical Evidence in Northeastern Italy
National Institute of Oceanography and Applied Geophysics – OGS, Udine, Italy
It is known that surface water accumulation by natural or anthropic causes like precipitation and reservoir impoundment can trigger earthquakes. The phenomenon is amplified and sped up in karst areas, where fracture systems can store large quantities of water and facilitate its percolation to seismogenic depths, increasing both elastic stress and pore pressure on pre-existent faults. The present work explored the possibility that this mechanism had systematically triggered major earthquakes in northeastern Italy, where seismicity is concentrated along the pre-Alpine thrust belt, characterized by the alignment of a series of karst massifs. The time occurrence of damaging and destructive earthquakes (moment magnitude Mw between 4.8 and 6.4) since 1901 was compared with the evolution of t ....

United States , United Kingdom , Friuli Venezia Giulia , Italy General , Gran Sasso , Baden Wüberg , Gustav Fischer Verlag , Tel Hariri , B Frenzel Stutgart , Nevee Valanghe , Geofisicae Vulcanologia , Europe Matthews , Regione Veneto , Carla Barnaba , Una Rinascita , Rapporto Conclusivo , Geografiska Annaler , Fabiana Zandonai , Terremoti Italiani , Speleologica Italiana , El Kenawy , Soil Properties , National Center , University Of Padua , Atmospheric Research Staff Editor , National Climatic Data Center ,

Frontiers | An Evaluation of Strong-Motion Parameters at the S-net Ocean-Bottom Seismograph Sites Near the Kanto Basin for Earthquake Early Warning


National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan
We analyzed strong-motion records at the ground and borehole in and around the Kanto Basin and the seafloor in the Japan Trench area from three nearby offshore earthquakes of similar magnitudes (Mw 5.8–5.9). The seafloor strong-motion records were obtained from S-net, which was established to enhance tsunami and earthquake early warnings after the 2011 great Tohoku-oki earthquake disaster. The borehole records were obtained from MeSO-net, a dense network of seismometers installed at a depth of 20 m in the Tokyo metropolitan area. The ground records were obtained from the K-NET and KiK-net networks, established after the 1995 great Hanshin-Awaji earthquake disaster. The MeSO-net and S-net stations record the shakings continuously, while the K-NET and KiK-net records are based on triggering thresholds. It is crucial to evaluate the properties of strong motions recorded by the S-net for eart ....

United States , Japan Trench , Japan General , New Zealand , Pingdong Xian , Baden Wüberg , R Hansen Cambridge , Headquarters For Earthquake Research Promotion , Observation Network For Earthquake , Seinnic Design For Nuclear Power Plants , Progress Of Seismic Observation Networks , Japan Meteorological Agency , Seafloor Observation Network , National Research Institute For Earth Science , Distribution Of The Metropolitan Seismic Observation Network , National Seismic , National Research Institute , Earth Science , Disaster Resilience , Metropolitan Seismic Observation , Tokyo Metropolitan , Peak Ground Accelerations , Peak Ground Velocities Between , Earthquake Research Promotion , Kanto Basin , Low Frequency Motions Between ,