Seismic event detection and phase picking are the base of many seismological workflows. In recent years, several publications demonstrated that deep learning approaches significantly outperform classical even achieve human-like performance under certain circumstances. However, as most studies differ in datasets exact evaluation tasks studied, it is yet unclear how different compare to each other. Furthermore, there no systematic models perform a cross-domain scenario, i.e., when applied data...

Abstract Machine-learning (ML) methods have seen widespread adoption in seismology recent years. The ability of these techniques to efficiently infer the statistical properties large datasets often provides significant improvements over traditional when number data are (millions examples). With entire spectrum seismological tasks, for example, seismic picking and detection, magnitude source property estimation, ground-motion prediction, hypocenter determination, among others, now...

On 12 September 2007, an M w 8.4 earthquake occurred within the southern section of Mentawai segment Sumatra subduction zone, where thrust had previously ruptured in 1833 and 1797. Traveltime data obtained from a temporary local seismic network, deployed between December 2007 October 2008 to record aftershocks event, was used determine two‐dimensional (2‐D) three‐dimensional (3‐D) velocity models segment. The seismicity distribution reveals significant activity along interface two clusters...

We present a new tomographic model of the mantle in area 2010 M8.8 Maule earthquake and surrounding regions. Increased ray coverage provided by aftershock data allows us to image detailed subducting slab structure mantle, from region flat subduction north rupture overlapping between 1960 M9.5 events south. have combined teleseismic primary depth phase arrivals with available local better constrain locations region, which we use conduct nested regional–global tomography. The reveals its...

Gravitational collapse of Mount Etna’s SE flank: New seafloor geodetic data capture active displacement underwater volcanic flank.

Abstract The postseismic deformation captured with continuous Global Positioning System (cGPS) monitoring following many recent megathrust events has been shown to be a signal composed of two dominant processes: afterslip on the plate interface and viscoelastic relaxation continental oceanic mantles in response coseismic stress perturbation. Following south central Chile 2010 Maule M w 8.8 earthquake, time series from regional cGPS network show distinct curvature pathway horizontal motion...

Abstract The depth of earthquakes along mid-ocean ridges is restricted by the relatively thin brittle lithosphere that overlies a hot, upwelling mantle. With decreasing spreading rate, may occur deeper in lithosphere, accommodating strain within thicker layer. New data from ultraslow-spreading Mid-Cayman Spreading Center (MCSC) Caribbean Sea illustrate to 10 km below seafloor and, hence, than most other slow-spreading ridges. MCSC spreads at 15 mm/yr full while similarly well-studied...

Abstract We examine the intra‐arc crustal seismicity of Andean Southern Volcanic Zone. Our aim is to resolve interseismic deformation in an active magmatic arc dominated by both margin‐parallel (Liquiñe‐Ofqui fault system, LOFS) and transverse faults. Crustal provides information about schizosphere tectonic state, delineating geometry kinematics high strain domains driven oblique‐subduction. Here, we present local based on 16‐month data collected from 34 seismometers monitoring a...

We use traveltime data of local earthquakes and controlled sources observed by a large, temporary, amphibious seismic network to reveal the anatomy southcentral Chilean subduction zone (37–39°S) between trench magmatic arc. At this location giant 1960 earthquake ( M = 9.5) nucleated ruptured almost 1000 km megathrust. For three‐dimensional tomographic inversion we used 17,148 P wave 10,049 S arrival time readings from 439 94 shots. The resolution images was explored analyzing model matrix...

Abstract Using offshore geodetic observations, we show that a segment of the North Anatolian Fault in central Sea Marmara is locked and therefore accumulating strain. The strain accumulation along this fault was previously extrapolated from onshore observations or inferred absence seismicity, but both methods could not distinguish between fully creeping behavior. A network acoustic transponders measured crustal deformation with mm-precision on seafloor for 2.5 years did detect any...

Abstract The rupture behavior of large oceanic strike‐slip earthquakes remains largely unresolved using seismic signals recorded thousands kilometers away from the source area. Large submarine earthquakes, however, generate hydroacoustic T‐waves propagating through ocean over long distances. Here, we show that these at regional distances on Ascension hydrophone array International Monitoring System can provide critical information earthquake location and behavior. We use recordings 47 events...

Abstract The Chilean margin is one of the Earth's tectonically most active plate boundaries, and yet, some its segments are still underexplored. Here, we present amphibious data from Copiapó region at ∼27°S located within mature Atacama seismic gap. Combined 2D refraction, multibeam bathymetry, local seismicity show a typical oceanic crust thickness 6–7 km P‐wave velocities between 3.0 7.3 km/s with slightly lower increased thicknesses underneath Ridge seamounts. latter likely due to...

The Atacama segment in Northern Chile (24{\deg}S to 31{\deg}S) is a mature seismic gap with no major event (Mw>8) since 1922. In addition regular seismicity, around the subducting Copiap\'o ridge, region hosts swarms, and shallow deep slow slip events. To characterize fine structure of this its seismic-aseismic interplay, we instrumented almost 200 geodetic stations. Using machine learning, derived dense, high-resolution seismicity catalog, encompassing over 165,000 events double-difference...

Abstract Turbidity currents carve Earth’s deepest canyons, form largest sediment deposits, and break seabed telecommunications cables. Directly measuring turbidity is notoriously challenging due to their destructive impact on instruments within path. This especially the case for canyon-flushing flows that can travel >1000 km at >5 m/s, whose dynamics are poorly understood. We deployed ocean-bottom seismometers safely outside currents, used emitted seismic signals remotely monitor...

The episodic stick-slip behavior of megathrust faults in subduction zones can lead to severe earthquakes and tsunamis that pose a catastrophic threat coastal populations. It is therefore great importance study their seismogenic conditions earthquake activity. Sumatra Java, located seaward the Sunda Arc, are geographically neighboring, but phenomena differ significantly. zone has been scene numerous very strong (Mw > 8), including 2004 magnitude Mw 9.1, while Java experienced only limited...

The Atacama segment in Northern Chile (24⁰S to 31⁰S) is a mature seismic gap with no major event (Mw≥8) since 1922. Nonetheless, the region regularly releases stress through shallow and deep slow slip events, hosts recurring swarm activity. To investigate this its complex seismic-aseismic behaviour, we instrumented almost 200 geodetic stations between November 2020 February 2024. Using machine learning techniques, derived dense, high-resolution seismicity...

The Louisville seismic gap associated with the subduction of Ridge (LR) along Tonga-Kermadec trench is a globally prominent feature. Due to lack near-field monitoring, earthquake potential and behavior in this region have long been an enigma. In study, we investigate micro-earthquake activity its southern erosive area using local network ocean bottom seismometers. Over 6 months offshore deployment, our catalog reaffirms existence at magnitudes ranging from Mw ~2.5 5.5. Furthermore, width...

Since 28 Ma, the North American, Pacific, and Gorda plates have been coupled, with Mendocino triple junction (MTJ) migrating northward exerting significant influence on coastal California northern San Andreas Fault system. While deformation within continental domain has well-documented, dynamics of oceanic lithosphere remain poorly understood. The subducting plate, constituting southern block Juan de Fuca is known as a nonrigidly deforming zone bounded by ridge to west, Cascadia front east,...

We installed a dense, amphibious, temporary seismological network to study the seismicity and structure of seismogenic zone in southern Chile between 37° 39°S, nucleation area great 1960 earthquake. 213 local earthquakes with 14.754 onset times were used for simultaneous inversion 1‐D velocity model precise earthquake locations. Relocated artificial shots suggest an accuracy hypocenter about 1 km (horizontally) 500 m (vertically). Crustal events along trench‐parallel transverse,...

Research Article| September 01, 2014 Splay fault activity revealed by aftershocks of the 2010 Mw 8.8 Maule earthquake, central Chile Kathrin Lieser; Lieser 1GEOMAR Helmholtz Centre for Ocean Kiel, 24148 Germany Search other works this author on: GSW Google Scholar Ingo Grevemeyer; Grevemeyer Dietrich Lange; Lange Ernst Flueh; Flueh Frederik Tilmann; Tilmann 2GFZ German Geosciences Potsdam, 14473 Germany3Free University Berlin, 14195 Eduardo Contreras-Reyes 4Departamento de Geofísica,...