Data Services Products: Infrasound-AELUMA-old Infrasound AELUMA Event Database

Summary

Infrasound AELUMA Event Database is a searchable and downloadable event database that holds information on events detected by an automated system based on the AELUMA event detection algorithm and code developed by de Groot-Hedlin and Hedlin (2015).

Description

AELUMA (Automated Event Location Using a Mesh of Arrays) is a new algorithm developed by de Groot-Hedlin and Hedlin to detect and locate geophysical events. AELUMA allows division of a sufficiently dense network, such as TA, into a mesh of three-element arrays (triads). The time and azimuth of the detected signals from the cluster of these triads is then used to locate the source.

Infrasound AELUMA Event Database is an event database that is created by running AELUMA algorithm over the TA infrasound data. The resulting uniform database of acoustic sources is hosted by IRIS’s Searchable Product Depository (SPUD). The event database holds the following information for each event. The bold items represent fields that user can use for event selection using SPUD’s user interface:

  • ID — Event ID
  • Date Time — Event Date Time
  • Latitude — Source latitude
  • Longitude — Source longitude
  • Celerity — Mean celerity (m/sec)
  • STD — Standard deviation of celerity (m/sec)
  • Triads — Total number of triads in cluster
  • Bad — Solution quality (0: best, 1: source on the edge of search grid, 10: source on the time grid boundary)
  • Sta — Total number of stations included in detecting triads
  • Min X-corr — Minimum cross correlation

In addition, SPUD hosts an event page for each event that displays event parameters, a record section of infrasound traces, list of contributing stations, a location map of the source and contributing stations.

Location map
Location of TA stations (blue) and the infrasound source (red) for the event of 2015-01-14 22:13:30 UTC.

Record section
Infrasound record section for the event of 2015-01-14 22:13:30 UTC with stations within 7 degrees of source location. Traces are filtered between 2 to 5 Hz.

Citations and DOIs

To cite the IRIS DMC Data Products effort:

  • Trabant, C., A. R. Hutko, M. Bahavar, R. Karstens, T. Ahern, and R. Aster (2012), Data Products at the IRIS DMC: Stepping Stones for Research and Other Applications, Seismological Research Letters, 83(5), 846–854, https://doi.org/10.1785/0220120032.

To cite the IRIS DMC Infrasound AELUMA Event Database or reference use of its events:

To cite the source or reference the use of Missouri S&T Shear-wave splitting database:

  • Catherine D. de Groot-Hedlin and Michael A.H. Hedlin, 2015, A method for detecting and
    locating geophysical events using groups of arrays, Geophys. J. Int. 2015 203: 960-971. https://doi.org/10.1093/gji/ggv345

References

  • Catherine D. de Groot-Hedlin and Michael A.H. Hedlin, 2015, A method for detecting and
    locating geophysical events using groups of arrays, Geophys. J. Int. 2015 203: 960-971. https://doi.org/10.1093/gji/ggv345

Credits

Catherine D. de Groot-Hedlin & Michael A.H. Hedlin

Contributors

Catherine de Groot-Hedlin
University of California, San Diego

Categories

Page built 14:08:04 | v.c1851ec0