This data set contains hypocentral parameters (latitude, longitude, depth, local magnitude, and origin time) for 13566 aftershocks of the 2019, M6.4 Durrës, Albania earthquake. Aftershocks were recorded with a 30 station local network, which started operation about two weeks after the and registered for about nine months. Event detections were produced with machine-learning-based tools. Aftershocks were located with a newly derived 1D velocity model with station corrections. Final relocation was done with the double-difference algorithm including cross correlation derived differential travel times. Local magnitudes range from Ml −1.8 to 4.6 with a magnitude of completeness of Mc ≈ 1.
This new seismicity catalog for the Northern Chile forearc region was created using a modern DL-based phase picker (EQTransformer) and a novel phase association algorithm (PyOcto). It contains a total of 2.2 million events, which is an order of magnitude more than previous catalogs of the region, and covers the years 2007-2023. Data from 196 temporary and permanent seismic stations was used to create the catalog. Events were relocated in a 2.5D velocity model that contains the high-velocity slab, then re-located with a double-difference approach using catalog travel-time differences. Although the overall completeness magnitude of the catalog was retrieved as 2.3, completeness estimates go down to 1.5 for events inside the network footprint in the years 2011-2016.
Ground-motion flatfiles are commonly used to develop ground motion models (GMMs) and for systematical analysis of ground motions over a wide range of distances and earthquake magnitudes. A flatfile is organized as a table of properties and various intensity measures of earthquake waveforms, including data processing parameters. Here we present a comprehensive processed ground-motion flatfile containing data from the Kyoshin (K-NET) and Kiban-Kyoshin (KiK-net) networks operated by National Research Institute for Earth Science and Disaster Resilience (NIED, 2019) in Japan (Okada et al., 2004; Aoi et al., 2011). This flatfile contains 951,103 ground motions from 18,782 earthquakes and 1,749 stations. Out of these, 450,890 ground-motions are from KiK-net and 500,213 from K-net. The events were recorded between June 1996 and December 2025, covering distances up to 1200 km and magnitudes between 2.5 and 9. The ground motions waveforms have been automatically processed, and metadata describing each event and record are provided in the flat file.
An overview of the flatfiles and the processing steps to derive the reported ground-motion parameters is provided in this report. Further details and discussion about the flatfile compilation can be found in the corresponding publication: Loviknes, K., von Specht, S., Lilienkamp, H., Händel, A., Chuanbin Z., and Cotton, F. (2026). Harmonization of KiK-net and K-NET Ground-Motion Parameters and Metadata: A Flatfile of 950,000 Three-Component Records Spanning 29 Years (submitted to Seismica, February 2025, resubmitted March 2026).