Jean-Mathieu Nocquet
Institut de Physique du Globe de Paris
GeologySeismologySlip (materials science)SubductionGeophysics
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Publications 59
#1Lillian Soto-Cordero (Lehigh University)H-Index: 2
#2Anne S. Meltzer (Lehigh University)H-Index: 19
Last. Yvonne FontH-Index: 17
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#1Hugo Yepes (National Technical University)H-Index: 23
#2Jean-Mathieu Nocquet (IPGP: Institut de Physique du Globe de Paris)H-Index: 23
Last. Santiago Aguaiza (National Technical University)H-Index: 4
view all 6 authors...
Abstract In the paper entitled “Two independent real-time precursors of the 7.8 M earthquake in Ecuador based on radioactive and geodetic processes – Powerful tools for an early warning system”, Toulkeridis et al. (2019) claim that they found radiation and GPS signal anomalies before the April 16th 2016 Pedernales earthquake (Ecuador) and that their findings can be used to forecast earthquakes in the medium and short term in active continental margins. Using an extended data set that overlaps To...
#1Shaozhuo Liu (KAUST: King Abdullah University of Science and Technology)
#2Xiwei Xu (CEA: China Earthquake Administration)H-Index: 32
Last. Sigurjón Jónsson (KAUST: King Abdullah University of Science and Technology)H-Index: 26
view all 7 authors...
#1Sandro Vaca (National Technical University)H-Index: 6
#2Martin Vallée (IPGP: Institut de Physique du Globe de Paris)H-Index: 22
Last. Alexandra Alvarado (National Technical University)H-Index: 13
view all 4 authors...
Abstract The recent development of a national seismic broadband network in Ecuador enables us to determine a comprehensive catalog of earthquake focal mechanisms at the country-scale. Using a waveform inversion technique accounting for the spatially variable seismic velocity structure across the country, we provide location, depth, focal mechanism and seismic moment for 282 earthquakes during the 2009–2015 period. Our results are consistent with source parameter determinations at the global scal...
1 CitationsSource
#1Pietro Sternai (University of Geneva)H-Index: 12
#2Christian Sue (University of Burgundy)H-Index: 21
Last. Sébastien Castelltort (University of Geneva)H-Index: 18
view all 15 authors...
Abstract Recent measurements of surface vertical displacements of the European Alps show a correlation between vertical velocities and topographic features, with widespread uplift at rates of up to ~2–2.5 mm/a in the North-Western and Central Alps, and ~1 mm/a across a continuous region from the Eastern to the South-Western Alps. Such a rock uplift rate pattern is at odds with the horizontal velocity field, characterized by shortening and crustal thickening in the Eastern Alps and very limited d...
1 CitationsSource
#1Mariah HoskinsH-Index: 1
#2Anne S. MeltzerH-Index: 19
Last. Andreas RietbrockH-Index: 33
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The north Ecuador subduction zone has a history of experiencing a range of slip modes including megathrust and other fast slip, slow, and aseismic slip. In 1906, a Mw 8.8 megathrust ruptured 500 km along the north Ecuador/Colombia margin. Parts of this region re-ruptured in events (south to north): ‘42 (Mw 7.8), ‘58 (Mw 7.7), and ‘79 (Mw 8.2). The April 16, 2016 Pedernales megathrust rupture overlapped the ‘42 rupture. Postseismic deformation following the 2016 event exhibited a range of slip be...
1 Citations
#1C. J. Ruhl (University of California, Berkeley)H-Index: 4
#2Diego Melgar (University of California, Berkeley)H-Index: 18
Last. Elisabetta D'Anastasio (GNS Science)H-Index: 14
view all 21 authors...
Displacement waveforms derived from Global Navigation Satellite System (GNSS) data have become more commonly used by seismologists in the past 15 yrs. Unlike strong‐motion accelerometer recordings that are affected by baseline offsets during very strong shaking, GNSS data record displacement with fidelity down to 0 Hz. Unfortunately, fully processed GNSS waveform data are still scarce because of limited public availability and the highly technical nature of GNSS processing. In an effort to furth...
4 CitationsSource
#1Andrea WalpersdorfH-Index: 27
#2L. PingetH-Index: 1
Last. Guy WöppelmannH-Index: 23
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The availability of GPS survey data spanning 22 years, along with several independent velocity solutions including up to 16 years of permanent GPS data, presents a unique opportunity to search for persistent (and thus reliable) deformation patterns in the Western Alps, which in turn allow a reinterpretation of the active tectonics of this region. While GPS velocities are still too uncertain to be interpreted on an individual basis, the analysis of range-perpendicular GPS velocity profiles clearl...
5 CitationsSource
#1Mónica Segovia (National Technical University)H-Index: 1
#2Yvonne Font (CNRS: Centre national de la recherche scientifique)H-Index: 17
Last. Andres PazmiñoH-Index: 1
view all 10 authors...
4 CitationsSource
Last. Yvonne FontH-Index: 17
view all 10 authors...