TRUAA Project: Upgrading Israel Seismic Network - Towards Earthquake Early Warning in Israel
Abstract
Following the recommendations of an international committee (Allen et al., 2012), since October 2017 the Israeli Seismic Network (ISN) has been undergoing significant upgrades, with 120 stations being added or upgraded throughout the country and the addition of two new data centers. These enhancements are part of the TRUAA project, assigned to the Geological Survey of Israel (GSI) by the Israeli Government, to provide Earthquake Early Warning (EEW) capabilities for the state of Israel. The GSI contracted Nanometrics, supported by local contractor MSI, to deliver these upgrades through a turnkey project, including detailed design, equipment supply, and deployment of the network and two data centers.
The network was designed and tailored by the GSI, in collaboration with the Nanometrics project team, specifically to achieve efficient and robust EEW. Several significant features comprise the backbone of this network: a) coverage - station distribution has high density (5-10 km spacing) along the two main fault systems, the Dead Sea Fault and the Carmel Fault System; b) instrumentation - high quality strong motion accelerometers and broadband seismometers with modern 3 channel and 6 channel dataloggers sampling at 200sps; c) low latency acquisition - data is encapsulated in small packets (< 1s), with primary routing via high speed, high capacity telemetry links (<1s latency); d) robustness - high level of redundancy throughout the system design: Dual active-active redundant acquisition routes from each station, each utilizing multicast streaming over an IPSec VPN tunnel, via independent high bandwidth telemetry systems Two active-active geographically separate data centers Dual active-active redundant seismic processing tool chains within each data center, implemented in a high availability protected virtual environment In addition, eight stations include co-located high quality GNSS receivers with medium-high stability short braced monuments, fully leveraging the dual route seismic data acquisition system. At this time, both data centers and over 100 stations are operational. The system is currently being commissioned, with full early warning operation targeted for the end of 2019. The high density, real-time continuous data has already proven to significantly enrich the seismic catalogue in Israel.- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.S41G0618K
- Keywords:
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- 0994 Instruments and techniques;
- EXPLORATION GEOPHYSICS;
- 5494 Instruments and techniques;
- PLANETARY SCIENCES: SOLID SURFACE PLANETS;
- 7294 Seismic instruments and networks;
- SEISMOLOGY;
- 7299 General or miscellaneous;
- SEISMOLOGY