| Abstract: | We describe a new probabilistic method that uses observations of modified Mercalli intensity (MMI) from past earthquakes to make quantitative estimates of ground shaking parameters (i.e., peak ground acceleration, peak ground velocity, 5% damped spectral acceleration values, etc.). The method uses a Bayesian approach to make quantitative estimates of the probabilities of different levels of ground motions from intensity data given an earthquake of known location and magnitude. The method utilizes probability distributions from an intensity/ground motion data set along with a ground motion attenuation relation to estimate the ground motion from intensity. The ground motions with the highest probabilities are the ones most likely experienced at the site of the MMI observation. We test the method using MMI/ground motion data from California and published ground motion attenuation relations to estimate the ground motions for several earthquakes: 1999 Hector Mine, California (M7.1); 1988 Saguenay, Quebec (M5.9); and 1982 Gaza, New Hampshire (M4.4). In an example where the method is applied to a historic earthquake, we estimate that the peak ground accelerations associated with the 1727 (M???5.2) earthquake at Newbury, Massachusetts, ranged from 0.23 g at Newbury to 0.06 g at Boston. |
| Genre: | Article |
| ProdID: | 70025801 |
| Citation Author: | Ebel, J. E.; Wald, D. J. |
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| Citation End Page: | 529 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Earthquake Spectra |
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| Citation Number Of Pages: | 19 |
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| Citation Search Results Text: | Bayesian Estimations of Peak Ground Acceleration and 5% Damped Spectral Acceleration from Modified Mercalli Intensity Data; 2003; Article; Journal; Earthquake Spectra; Ebel, J. E.; Wald, D. J. |
| Citation Start Page: | 511 |
| Citation Volume: | 19 |
| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | Bayesian Estimations of Peak Ground Acceleration and 5% Damped Spectral Acceleration from Modified Mercalli Intensity Data; 2003; Article; Journal; Earthquake Spectra; Ebel, J. E.; Wald, D. J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1193/1.1596549 |
| Date Other: | Wed, 1 Jan 2003 00:00 -0600 |
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