Affiliation:
1. 1Centro Nacional de Investigaciones Sismológicas (CENAIS), Santiago de Cuba, Cuba
2. 2Istituto Nazionale di Oceanografia e di Geofisica Sperimentale—OGS, Trieste, Italy
3. 3Istituto Nazionale di Geofisica e Vulcanologia (INGV), Osservatorio Nazionale Terremoti, Ancona, Italy
Abstract
Abstract
The detection level of a seismic network is a measure of its effective ability to record small earthquakes in a given area. It can vary in both space and time and depends on several factors such as meteorological conditions, anthropic noise, local soil conditions—all factors that affect the seismic noise level—as well as the quality and operating condition of the instruments. The ability to estimate the level of detection is of tremendous importance both in the design of a new network and in determining whether a given network can recognize seismicity consistently or needs to be improved in some of its parts. In this article, we determine the detection level of the Cuban seismic network using the empirically estimated seismic noise spectral level at each station site and some theoretical relationships to predict the signal amplitude of a seismic event at individual stations. The minimum local detectable magnitude thus depends on some network parameters such as the signal-to-noise ratio and the number of stations used in the calculation. We also demonstrate the effectiveness of our predictions by comparing the estimated detection level with those empirically determined from one year of data (i.e., the year 2020) of the Cuban seismic catalog. Our analysis shows, on the one hand, in which areas the current Cuban network should be improved, also depending on the regional pattern of faults, and, on the other hand, indicates the magnitude threshold that can be assumed homogeneously for the catalog of Cuban earthquakes in 2020. Because the adopted method can use current measurements of the seismic noise level (e.g., daily), the proposed analysis can also be configured for continuous monitoring of network state quality.
Publisher
Seismological Society of America (SSA)
Reference53 articles.
1. Estimación de la peligrosidad sísmica de la región suroriental de Cuba;Álvarez;Fizika Zemli,1977
2. Peligrosidad sísmica de Cuba. Una aproximación a la regionalización sísmica del territorio nacional;Álvarez;Revista Geofísica del Instituto Panamericano de Geografía e Historia,1991
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献