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Mo and O isotope data for Tonga-Kermadec arc lavas and DSDP site 204 sediments

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Local Earthquake Tomographic Models of the Southern Puna Plateau

This data publication includes digital data of the final 3D tomographic model from Chen et al. (2020: Lithospheric delamination beneath the southern Puna plateau resolved by local earthquake tomography). The 3D seismic velocity models are results of a local earthquake tomography which is performed to illuminate the crustal and uppermost mantle structure beneath the southern Puna plateau and to test the delamination hypothesis. The Southern Puna is distinctive from the rest of the Central Andean plateau in having a higher topographic elevation, a thinner lithosphere and in being flanked to the south by the Chilean flat slab region. Previous investigations involving geochemical, geological and geophysical observations, have invoked lithospheric delamination to explain the distinctive magmatic and structural history, elevation and lithospheric thickness of the region. In the present study, Vp and Vp/Vs ratios were obtained using travel time variations recorded by 75 temporary seismic stations between 2007 and 2009. The earthquakes catalog (Mulcahy et al., 2014) contains 1903 local earthquakes (25077 P- and 14059 S-picks). A minimum 1D model is derived with software VELEST (Kissling et al., 1995). The 3D tomographic inversion is performed with software SIMULPS (Thurber, 1983; Evans et al., 1994). Spread values are used to define well resolved model domains (6 for Vp and 5.5 for Vp/Vs), which are calculated from the model resolution matrix (Toomey & Foulger, 1989). The data are provided as one tar.gz archive. Individual ASCII files contain, at each depth from 0 to 200 km: - Vp model (model.vp.depth_???km), format: longitude, latitude, depth, Vp perturbation, absolute Vp - Vp/Vs model (model.vpvs.depth_???km), format: longitude, latitude, depth, Vp/Vs perturbation, absolute Vp/Vs - spread values for Vp (spread.vp.depth_???km), format: longitude, latitude, depth, spread value - spread values for Vp/Vs model (spread.vpvs.depth_???km), format: longitude, latitude, depth, spread value

Survey Mode GPS data in the IPOC Region, Central Andes, Chile

The survey-mode GPS (sGPS) network in the IPOC region consists of 91 geodetic markers. Over the last decade, the positions of these points in the network have been periodically measured, thus enabling us to quantify the decadal patterns of deformation processes. This temporal catalogue of coordinates complement the continuous GPS (cGPS) array. Meta-data and raw data in Rinex format for the surveys carried out in 2008, 2011, 2013, 2014, 2015, and 2016 are available for 91 sites in the north of Chile and the northwest of Argentina. Included in this temporal catalogue are observations made shortly after the 2014 Pisagua-Iquique earthquake. Detailed information about data availability, metadata and site descriptions can be found at: https://kg189/gnss/IPOCSGPS. More description about the Integrated Plate Boundary Observatory Chile (IPOC) can be found at the IPOC Website (www.ipoc-network.org) and on the sGPS Survey on www.ipoc-network.org/associated-projects/gps-campaigns/.

Catalogue of Hypocenters for the 2014 M8.1 Iquique Earthquake Sequence, recorded by IPOC (plus additional) seismic stations

The present dataset is a high-resolution earthquake catalog for the region of the 2014 M8.1 Iquique earthquake sequence, in the Northern Chile subduction zone. Events in the catalog were obtained processing seismic waveforms from >100 permanent and temporary seismic stations. The list of waveform data sources used, the multistage automatic earthquake detection and location procedure implemented to build the catalog, as well as the patterns outlined by the seismicity are described in Soto et al. (2019).The dataset file contains information of hypocenters (one event per line), structured in a format with the following columns: # year, month, day, hour, minute, second (UTC), longitude [dec. degrees], latitude [dec. degrees], depth [km], magnitude [ML]Seismic waveform data were taken from networks CX (GFZ and CNRS-INSU, 2006), IQ (Cesca et al., 2018), 3D (Asch et al., 2014) and GE (GEOFON, 1993) accessed via EIDA webservices (e.g., https://geofon.gfz-potsdam.de/), as well as from Chilean Seismological Network (C, C1) stations (Barrientos et al., 2018) accessed via IRIS webservices (http://ds.iris.edu/SeismiQuery/). Additional waveform data were used from the MEJIPE temporary network deployed by FU Berlin (Salazar et al., 2013) accessed via EIDA webservices as well as from a temporary network deployed by the Chilean ONEMI, DGF and CSN institutions accessed from CSN upon request.

Data of the Western Makran Seismic Transects (Iran)

In September 2017 three crustal-scale seismic profiles were acquired in southern Iran covering the subaerial accretionary wedge of the western part of the Makran Subduction zone. Each of the roughly north-south trending profiles was approximately 200 km long, and on each profile 9 to 10 artificial shots with charges between 400 and 800 kg of explosives were fired. The seismic signals were observed by 300 autonomous digital recorders with geophones on each profile. This dataset consists of the raw (continuous) data of the recorders (in proprietary cube format and MSEED-format) and the shot records in SEGY-format (standard exchange formats).

Particle image correlation data from Foamquake: a novel seismotectonic analog model mimicking the megathrust seismic cycle

This dataset includes particle image correlation data from 26 experiments performed with Foamquake, a novel analog seismotectonic model reproducing the megathrust seismic cycle. The seismotectonic model has been monitored by the means of a high-resolution top-view monitoring camera. The dataset presented here represents the particle image velocimetry surface velocity field extracted during the experimental model through the cross-correlation between consecutive images. This dataset is supplementary to Mastella et al. (2021) where detailed descriptions of models and experimental results can be found.

Catalogue of Earthquake Hypocenters for Northern Chile Compiled from IPOC (plus auxiliary) seismic stations

The present dataset is a comprehensive earthquake catalogue for the Northern Chile subduction zone forearc, determined from IPOC seismic station data (GFZ and CNRS-INSU 2006; http://doi.org/10.14470/PK615318) plus some auxiliary stations (IPOC = Integrated Plate Boundary Observatory Chile; http://www.ipoc-network.org). The method of automatized earthquake catalogue retrieval, the different relocation steps as well as the different earthquake class labels and the structures outlined by the seismicity are described in detail in Sippl et al. (2018). Unlike the catalogue that is supplied as a supplementary file with said paper, this record here will grow over the years, i.e. data from additional years beyond 2014, processed in the same way, will be added.The columns of the data files are:year, month, day, hour, minute, second, latitude [dec. degrees], longitude [dec. degrees], depth [km], magnitude [ML], identifierThe identifier term provides a first-order spatial classification of the seismicity, an explanation is given in Table 1 of Sippl et al. (2018).

Particle image velocimetry data from an analog seismo-tectonic model addressing the interaction between neighbor asperities

This dataset includes the results of Particle Image Velocimetry (PIV) of one experiment on subduction megathrust earthquakes (with interacting asperities) performed at the Laboratory of Experimental Tectonics (LET) Univ. Roma Tre in the framework of AspSync, the Marie Curie project (grant agreement 658034; https://aspsync.wordpress.com). Detailed descriptions of the experiments and monitoring techniques can be found in Corbi et al. (2017). This data set is from one experiment characterized by the presence of a 7 cm wide barrier separating two asperities with equal size, geometry and friction. Here we provide PIV data relative to a 16.3 min long interval during which the experiment produces 138 analog earthquakes with an average recurrence time of 7 s. The PIV analysis yields quantitative information about the velocity field characterizing two consecutive frames, measured in this case at the model surface. For a detailed description of the experimental procedure, set-up and materials used, please refer to the article of Corbi et al. (2017) paragraph 2. This data set has been used for: a) studying velocity variations (Fig. 2 in Corbi et al., 2021) and rupture patterns (Fig. 3a, b in Corbi et al., 2021) occurring during the velocity peak of one of the two asperities (aka trigger).

SO297-land

- Installation of 29 short-period seismometers between Copiapo and Taltal to monitor seismic events - The deployment was between February 2023 and June 2023 - Registering continuously 250 SPS - Onshore component of research cruise SO297 with RV Sonne. Waveform data is available from the GEOFON data centre, under network code 5R.

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