Rosero Rueda, Sandra Patricia

Publication Search Results

Now showing 1 - 1 of 1

Local magnitude (Ml) calibration for the Puerto Rico Seismic Network
(2023-05-17) Rosero Rueda, Sandra Patricia; Huérfano Moreno, Victor; College of Arts and Sciences - Sciences; Vanacore, Elizabeth A.; López, Alberto; Department of Geology; Vicente , Nancy V.
The Puerto Rico and Virgin Islands region (PRVI) region is seismically active due to its geographical location, averaging thousands of earthquakes per year, mostly small events (M<4.0). However, the archipelago of Puerto Rico has been affected by significant events throughout history, such as the recent seismic sequence in the southwestern region, with the principal M6.4 event occurring on January 07, 2020, among others (1670, 1787, 1867, 1918, etc.). Actually, the Puerto Rico Seismic Network (PRSN) publishes the magnitude of the earthquakes based on the duration (Md). At this moment, it does not publish local magnitude (Ml) due to lack of calibration; for this reason, a computation and validation of Ml in the PRSN systems is proposed, based on the original Richter definition. In this research, we use data from local earthquakes recorded from the multiple instruments from PRSN (including broadband and short-period seismometers), particularly the new stations installed after the impact of the hurricanes in 2017. The results were compared with the United States Geological Survey (USGS) ComCAT earthquake catalog for the PRVI region and a graphical relationship between the published Ml vs the computed Ml is established.