Dataset View
https://doi.org/10.31905/G0EL5M90
Submission date: 05-06-2025
Lerma Valley Ring Installation of Seismometers
Brief Description: In August 2017, we deployed a temporary seismic network—the Lerma Valley Ring Installation of Seismometers (LEVARIS)—around the city of Salta in northwestern Argentina. The network covered the central and northern parts of the Lerma Valley and operated for thirteen months, comprising thirteen stations. It is cataloged in the FDSN under the official international temporary network code 2Q (2017–2018). The LEVARIS network spanned approximately 80 km in the north–south direction and 30 km east–west. The stations were equipped primarily with Lennartz 3D/5s three-component sensors, with one station using a Mark L4C-3D short-period sensor, buried at a depth of approximately 60 cm. Data acquisition was performed using DATA-Cube3 Type 2 digitizers at a sampling rate of 100 Hz. Power was supplied by batteries recharged via solar panels. Seismic events were manually picked using Snuffler (Heimann et al., 2019), with all picks and first-motion polarities reviewed multiple times. Event locations were determined using HYPOSAT (Schweitzer, 2001), applying the global velocity model AK135 alongside regional models CRUST1.0 (Kissling et al., 1995) and Zeckra’s Santa Barbara system model (Zeckra, 2020). Local magnitudes (ML) were calculated using the updated IASPEI local magnitude scale (Bormann & Dewey, 2012): ML = log A + 1.11 · log R + 0.00189 · R – 2.09 where A is the maximum horizontal amplitude (Wood-Anderson equivalent) and R is the hypocentral distance. This magnitude scale is consistent with that used by Argentina's national seismological agency (INPRES; Sánchez et al., 2013). Focal mechanisms were determined using FOCMEC (Snoke, 2003), employing a linear inversion of first-motion polarities under the assumption of double-couple point sources. Source–receiver paths were modeled using the Cake ray-tracer (Heimann et al., 2019). To refine ambiguous or oscillatory solutions, focal mechanisms were further corrected via waveform cross-correlation. The final dataset includes 25 manually validated and reliably constrained focal mechanisms.
Corresponding Author:
Emilio José Marcelo Criado-SuttiRelated Publications:
Criado Sutti, E., Zeckra, M., Elías, L., Krüger, F., Montero-López, C., and Hongn, F. and Strecker, M. R. (2025, soon submitted). Microseismicity and active deformation processes in an intermontane basin within a thick-skinned thrust belt: the Lerma Valley of the Eastern Cordillera in the Central Andes, north-western Argentina. Geophysical Journal International.
Criado-Sutti, E., Olivar-Castaño, A., Krüger, F., Montero-López, C., and Aranda-Viana, G., Zeckra, M. and Heimann, S. (2025, soon submitted). Deciphering the Crustal Structure of the Lerma Valley (NW Argentina): A Multi-Method Seismic Investigation. EGU: Solid Earth.
Download File:
criado-sutti_1.zip File size: 688K
File Contents:
| levaris_inventory.xml |
| levaris_catalog.xml |
| focal_mechanisms.csv |
| events_with_fm.csv |
| README.md |
Cite as:
Criado-Sutti, E., Zeckra, M., Krüger, F., López, C., Hongn, F., Elías, L., Aranda-Viana, G., Escalante, L., Aramayo, A., Alvarado, L. (2025). Lerma Valley Ring Installation of Seismometers, ISC Seismological Dataset Repository, https://doi.org/10.31905/G0EL5M90
