Abstract
Abstract. With the support of the US National Science Foundation (NSF) and on behalf of the international seismological community, IRIS developed a Data Management Center (DMC; Ahern, 2003) that has for decades acted as a primary resource for seismic networks wishing to make their data broadly available, as well as a significant point of access for researchers and monitoring agencies worldwide that wish to access high quality data for a variety of purposes. Recently IRIS has taken significant new steps to improve the quality of and access to the services of the IRIS DMC. This paper highlights some of the current new efforts being undertaken by IRIS. The primary topics include (1) steps to improve reliability and consistency of access to IRIS data resources, (2) a comprehensive new approach to assessing the quality of seismological and other data, (3) working with international partners to federate seismological data access services, and finally (4) extensions of the federated concept to extend data access to data from other geoscience domains.
Highlights
Most of IRIS’ applications use these web services and it is much simpler to deploy systems at multiple locations once the web service infrastructure is deployed. This infrastructure is fully deployed at the Auxiliary Data Center (ADC) and the ADC services function identically to the services at the primary Data Management Center (DMC). In the future it is IRIS’ plan to leverage an external load balancing system that will seamlessly route some requests to the primary DMC and others to the ADC based on business rules such as how busy one system is over the other system, geographic proximity to one or the other services, or other business rules yet to be determined
As new time series arrive at IRIS either in real time or by delayed file transfer procedures, a system of roughly 50 metric calculators derives statistical metrics that characterize a day’s worth of waveform data
The entire list of metrics being calculated can be found at http://service.iris.edu/mustangbeta/metrics/1/query and the list will evolve dynamically as new ways of looking at data quality are determined with time
Summary
For several decades IRIS has relied on a single centralized data center in Seattle, Washington to provide all services to the community. In 2006 we created an Active Backup System at the PASSCAL Instrument Center in Socorro, New Mexico This backup system held copies of all the primary waveform data, key software source and binaries, documentation and a variety of other information in case of a catastrophic event at the primary center such as fire or earthquake. In 2013 the DMC transitioned the Active Backup concept to a fully functioning Auxiliary Data Center (ADC) where all of the services of the primary IRIS data center would be replicated and available at all times. Most of IRIS’ applications use these web services and it is much simpler to deploy systems at multiple locations once the web service infrastructure is deployed This infrastructure is fully deployed at the ADC and the ADC services function identically to the services at the primary DMC. In principle it would be possible to install additional ADCs in the US or around the world if resources were available
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