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Duration Magnitude Scale for Anbar Seismic Station (ANB1), Iraq | ||
| Journal of University of Anbar for Pure Science | ||
| Volume 18, Issue 1, June 2024, Pages 263-270 PDF (584.85 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.37652/juaps.2024.145556.1170 | ||
| Authors | ||
| Asmaa Najim Aljabory* ; Emad Abdulrahman Al-Heety | ||
| Department of Applied Geology, College of Science, University of Anbar, Iraq | ||
| Abstract | ||
| Abstract Measuring an earthquake's magnitude is a routine task at all seismological observatories. The current study aims to derive the earthquake duration magnitude scale for Anbar seismic station (ANB1), which is one of the stations of the Mesopotamian Seismological Network (MPSN) in Iraq. Ninety-five earthquakes were selected based on the clarity of the seismic signal coda to derive duration magnitude from linear regression between local magnitude ML extracted from International Seismological Center (ISC) bulletins and signal coda length (tc). The obtained relation is: MD = 1.085 + 1.263 Log tc+ 0.03 The results of the regression analysis showed a high correlation coefficient (0.86) with an significance level less than 0.05 and this reflects the strength of the relationship and the reliability of its use in calculating the earthquake magnitude. The derived relationship was used to estimate MD for 41 events recorded by the ANB1 station. To build a scaling relationship between MD and ML, MD values were compared with ML values for the same events where regression analysis results showed significant strong correlation relationship at p ˂ 0.05: MD = 0.9 + 0.78 ML This relationship is used quickly and reliably in MD calculation by ML for earthquakes recorded by ANB1 and vice versa. | ||
| Keywords | ||
| Duration magnitude; Coda length; Local magnitude; Mesopotamian network | ||
| References | ||
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