2003年5月21日阿尔及利亚当地时间19∶44分,在位于阿尔及利亚首都阿尔及尔东北70千米的海中,发生了里氏6.9级地震,极震区烈度达到Ⅹ度,为典型的小震级大烈度地震。通过卫星照片可以看到,在长150千米、宽40千米的受灾面积上,有55个严重破坏点,每个破坏点上有数量不等的若干幢建 On May 21, 2003, at 19:44 local time in Algeria, a magnitude 6.9 earthquake struck the sea 70 kilometers northeast of Algiers, capital of Algeria, with a maximum intensity of Ⅹ degree in the extreme earthquake area. Earthquake intensity. As can be seen from the satellite photos, there are 55 serious damage points on the affected area of ​​150 km in length and 40 km in width, with a number of buildings of varying sizes on each destruction point