Station Validation using Regional Amplitude Comparisons of Teleseismic Events
Abstract
Large teleseismic events (e.g. >M6) provide network operators unique opportunities to verify the integrity of their metadata, as well as the quality of waveform data at their stations. For global networks, this is routinely done by either comparing co-located sensors or using long-period synthetics. However, most regional networks do not have co-located sensors at a given station. Furthermore, their instrumentation is not always able to resolve very long-period data (e.g. 100 s period and greater). Therefore, different approaches are necessary to verify the health of stations in their network. We develop an approach to verify station amplitudes, detect significant timing errors, and assure signal fidelity by making use of the direct P-wave arrivals for several nearby stations. That is, for a specific test station we compare the amplitude, cross-correlation, and lag for a stacked waveform produced by all stations within a set distance of our test station. By doing this, we are able to identify situations where the metadata doesn't correctly reflect the sensitivity of the instrument under test, as well as cases where the fidelity of the signal appears compromised.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.S41F0599R
- Keywords:
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- 0545 Modeling;
- COMPUTATIONAL GEOPHYSICS;
- 7260 Theory;
- SEISMOLOGY;
- 7270 Tomography;
- SEISMOLOGY;
- 7290 Computational seismology;
- SEISMOLOGY