Observation of microseism in IRIS records before the 2010-01-12 Haiti earthquake
IRIS台网地震仪资料出现2010年1月12日海地大地震"震前扰动现象"

On Jan.12, 2010 the Mw 7.0 earthquake struck the Caribbean island country of Haiti. We found that significant fore-seismic tremor signals were observed during Jan.10~12 by broadband seismometers near the epicenter and these far away in the North American continent. The periods the signals are mainly in the band of 3~10 s. January is not Atlantic hurricane season and no strong tropical storms were found on the Caribbean Sea, the Gulf of Mexico and the Atlantic in Jan.10~12, which means the tremor is a microseism not induced by storms.