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|Authors: ||Plasencia Linares, Milton Percy*|
|Title: ||Acquiring data in real time in Italy from the Antarctic Seismographic Argentinean Italian Network (ASAIN): testing the global capabilities of the EarthWorm and Antelope software suites|
|Editors: ||Pesaresi, Damiano; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia|
Sleeman, Reinoud; ORFEUS
|Issue Date: ||2-May-2010|
|Keywords: ||ASAIN network|
|Abstract: ||The Italian National Institute for Oceanography and Experimental Geophysics (Istituto Nazionale di Oceanografia
e di Geofisica Sperimentale, OGS) is running the Antarctic Seismographic Argentinean Italian Network (ASAIN),
made of 7 seismic stations located in the Scotia Sea region in Antarctica and in Tierra del Fuego - Argentina: data
from these stations are transferred in real time to the OGS headquarters in Trieste (Italy) via satellite links provided
by the Instituto Antártico Argentino (IAA).
Data is collected and archived primarily in Güralp Compress Format (GCF) through the Scream! software at OGS
and IAA, and transmitted also in real time to the Observatories and Research Facilities for European Seismology
The main real time seismic data acquisition and processing system of the ASAIN network is based on the Earth-
Worm 7.3 (Open Source) software suite installed on a Linux server at the OGS headquarters in Trieste. It runs several
software modules for data collection, data archiving, data publication on dedicated web servers: wave_serverV,
Winston Wave Server, and data analysis and realtime monitoring through Swarm program.
OGS is also running, in close cooperation with the Friuli-Venezia Giulia Civil Defense, the North East (NI) Italy
seismic network, making use of the Antelope commercial software suite from BRTT as the main acquisition system.
As a test to check the global capabilities of the Antelope software suite, we also set up an instance of Antelope
acquiring data in real time from both the regional ASAIN seismic network in Antarctica and a subset of the Global
Seismic Network (GSN) funded by the Incorporated Research Institution for Seismology (IRIS). The facilities of
the IRIS Data Management System, and specifically the IRIS Data Management Center, were used for real time
access to waveform required in this study.
The first tests indicated that more than 80% of the earthquakes with magnitude M>5.0 listed in the Preliminary
Determination of Epicenters (PDE) catalogue of the National Earthquake Information Center (NEIC) of the United
States Geological Survey (USGS) were also correctly automatically detected by Antelope, with an average location
error of 0.05 degrees and average body wave magnitude Mb estimation error below 0.1. The average time
difference between event origin time and the actual time of event determination by Antelope was of about 45’: the
comparison with 20’, the IASPEI91 P-wave travel time for 180 degrees distance, and 25’, the estimate of our test
system data latency, indicate that Antelope is a serious candidate for regional and global early warning systems.|
|Appears in Collections:||Conference materials|
04.06.06. Surveys, measurements, and monitoring
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