Microseisms Generated off the Texas Coast

Abstract

Microseisms that were generated in the Gulf of Mexico were recorded using a seismometer in Hockley, Texas. They were induced by atmospheric disturbances over the Gulf. Their frequency was found using a window length of 204.8 sec. They propagated at a primary frequency of 0.15 cps 0.20 cps and a secondary frequency of 0.33 cps to 0.38 cps. Their behavior for different weather conditions supported the belief that primary microseisms are generated in shallow waters while secondary microseisms may be generated in shallow or deep waters. The secondary microseism was unstable. It would seemingly disappear when it had been present two to three minutes before. Further investigation of this instability should be done using a window of the same length or shorter.