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Updated: Jul 11, 2026
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Modifying the Bank Erosion Hazard Index (BEHI) Protocol for Rapid Assessment of Streambank Erosion in Northeastern Ohio
Published on: February 13, 2015
Summary
Southern New England experienced higher earthquake activity from 1725-1824 than in the following century. This seismic hazard analysis estimates a return period of 25 years for intensity VI+ earthquakes.
Area of Science:
- Seismology
- Earthquake Hazard Analysis
- Geophysics
Background:
- Historical seismic data for Southern New England from 1725-1974 was analyzed.
- Earthquake occurrences in the region showed temporal variations, with higher activity noted between 1725 and 1824.
Purpose of the Study:
- To calculate earthquake return periods and occurrence probabilities for Southern New England.
- To assess the seismic hazard considering historical earthquake data.
Main Methods:
- Analysis of available seismic data spanning 1725-1974.
- Calculation of mean interoccurrence times for earthquakes of varying intensities.
Main Results:
- Earthquake activity in Southern New England was not constant, exhibiting higher rates in the early period (1725-1824).
- The estimated return period for earthquakes of intensity VI or greater is 25 years.
- The estimated return period for earthquakes of intensity VIII or greater is 130 years.
Conclusions:
- Temporal variations in seismic activity introduce significant uncertainties in earthquake hazard calculations.
- The study provides quantitative estimates for earthquake return periods in Southern New England.
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