... properties of microseismicity often remain elusive. In this study, we use high signal‐to‐noise ratio seismograms of 204 M L 0.0–1.8 earthquakes induced by the 6 km deep 2018 Espoo/Helsinki geothermal stimulation to evaluate the performance and capabilities of beamforming and backprojection array methods...

... backprojection using near‐field strong‐motion records. Four segments were set, consisting of three segments along the East Anatolian fault and one segment along the splay fault where the rupture started. The estimated rupture velocities at the four segments were 2.6–3.3 km/s. The broadband (0.2–10 Hz) source...

...Eric Beaucé; William B. Frank; Léonard Seydoux; Piero Poli; Nathan Groebner; Robert D. van der Hilst; Michel Campillo Abstract We introduce BPMF (backprojection and matched filtering)—a complete and fully automated workflow designed for earthquake detection and location, and distributed in a Python...

... of the triplet. This approach includes linear slip inversion of regional seismic waveforms and static Global Positioning System offsets, along with backprojection of regional waveforms using the Source‐Scanning Algorithm technique. The detailed modeling suggests that three adjacent, subparallel (∼300°), and low...

... PGA and PGV values reveals that our MMI values are lower than predicted by ground‐motion intensity conversion equations that are based on shallow crustal earthquakes. The image of the earthquake rupture obtained using teleseismic backprojection at 0.5–2.0 Hz is coincident with the region of maximum...

...Maria Mesimeri; Hao Zhang; Kristine L. Pankow Abstract We present the application of a backprojection method for imaging the detailed rupture of the 2020 M w 5.5 Magna, Utah, earthquake. This is the first time that this method is applied to an earthquake smaller than M w 6 in a local scale using...

... to such situations. To do so, we use a pattern detection metric based on the principle of backprojection to reveal candidate sources followed by graph‐theory‐based clustering and an integer linear optimization routine to associate arrivals with the minimum number of sources necessary to explain the data. This method...

...Chao Song; Zengxi Ge ABSTRACT We carry out a backprojection analysis of high‐frequency P ‐wave signals to image the rupture process of the 8 September 2017 M w 8.2 Chiapas earthquake based on the 3D velocity model LLNL‐G3Dv3. Results show that the entire ∼ 56 s unilateral rupture process clearly...

... the epicenter for 12 days. Backprojection of the data was used to automatically detect and locate aftershocks. The co‐deployment of a traditional aftershock network of 36 stations at ∼ 2 – 10 km spacing enables a quantitative comparison. The AIDA backprojection aftershock catalog is complete to M − 0.5...

... the moveout of the acoustic wave through the ionosphere. We used a method commonly used in seismological studies called backprojection to estimate the location of the source of the TEC perturbation on Earth’s surface. This is the first time that this method has been applied to TEC data, and the results...

...Zhipeng Liu; Chao Song; Lingsen Meng; Zengxi Ge; Qinghua Huang; Qingju Wu Abstract We applied a backprojection (BP) analysis based on a 3D global P ‐wave tomography model to image the spatiotemporal rupture process of the 2015 M w 7.8 Nepal earthquake. First, we used BP to determine the centroid...

...Dun Wang; Jim Mori Abstract We apply a backprojection analysis to determine the locations and timing of the sources of short‐period (0.5–5 s) energy generated by the 2015 Nepal earthquake. We use data from four different arrays at varying azimuths in Europe, China, Japan, and Australia, which show...

...Cengiz Esmersoy; Douglas Miller Abstract Seismic migration can be viewed as either backprojection (diffraction-stack) or backpropagation (wave-field extrapolation) (e.g., Gazdag and Sguazzero, 1984). Migration by backprojection was the view supporting the first digital methods--the diffraction...