【摘要】 2010年1月12日,加勒比岛国海地爆发了Mw7.0级大地震.震中附近的宽带地震仪记录在1月10 1月12日观测到了显著的"震前扰动"现象.扰动信号的周期为3～10秒.北美大陆的宽带地震仪也记录到了类似的扰动信号.海地大地震"震前扰动"发生期间,加勒比海域及周围海域没有发生任何海洋风暴.海地大地震的"震前扰动"是由某种非台风因素引发的.更多还原

【Abstract】 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.更多还原