Category: At Work

17 August 2020–For decades, seismologists have contended with the background “hiss” of the Earth—seismic waves generated by the normal interaction of land, ocean and atmosphere. Their goal has been to find ways to subtract this “noise,” to concentrate on the seismicity generated by earthquakes. But one scientist’s noise is another’s … Continue Reading »

13 July 2020–Deep long period (DLP) earthquakes occur close to the base of the crust and contain seismic waveforms with  frequencies less than 5 Hz—a phenomenon very different from the high frequency, relatively shallow tectonic activity that most people think of as an earthquake. DLP earthquakes are most often associated … Continue Reading »

16 June 2020–In 1988, as a graduate student, SSA President Bill Walter and his colleagues arrived in Kazakhstan to record a Soviet nuclear test as part of the U.S.-USSR Joint Verification Experiment (JVE). The partnership was an unusual one in the context of the Cold War: U.S. and Soviet scientists … Continue Reading »

15 May 2020–When Janis Hernandez was studying for her associate degree, she took an introduction to geology class to meet a science requirement. “After that, I kept thinking, ‘what’s wrong with me, why am I thinking so much about rocks?’” she says. “It was just so interesting. And once you … Continue Reading »

15 April 2020–Exploring planets other than the Earth was Hrvoje Tkalčić’s first love, he says. “Ever since I can remember I wanted to become an astronaut.” Tkalčić, now the head of seismology and mathematical geophysics at The Australian National University, was fascinated by the universe and adept in mathematics and … Continue Reading »