Earthquake record for Loma Blanca fault

A study combines uranium-thorium dating and carbon isotope analyses of calcite to quantify the frequency of earthquakes on the Loma Blanca fault in New Mexico for much of the last 550,000 years, and finds that earthquakes generally occurred at regular rather than aperiodic intervals except for a brief interval of increased earthquake frequency approximately 430,000 years ago; the findings provide insights into the long-term seismic behavior of a potentially representative intraplate fault. - Read at PNAS

Article #16-17945: “Reading a 400,000-year record of earthquake frequency for an intraplate fault,” by Randolph T. Williams, Laurel B. Goodwin, Warren D. Sharp, and Peter S. Mozley.