There were seven other locally felt tremors caused by earthquakes near heyuan in guangdong with magnitudes of about four on the richter scale 此外，有七次有感地震的震央在广东省河源附近，都是四级左右的地震。
The seismology research centre says the earthquake measured 3 . 8 on the richter scale with an epicentre about 80 kilometres south - west of sydney 地震研究中心称这次地震的震级为里氏3 . 8级，震中位于悉尼西南80公里处。
The beijing - based china seismological station also released a bulletin two hours after the quake , and measured it at 6 . 3 on the richter scale 中国北京地震局也在两个小时后发布了一个公告说:测量地震的强度为里氏6 . 5级
Kanto earthquake the worst earthquake in japan ' s history hit the kanto plain between tokyo and yokohama with a magnitude of 7 . 9 on the richter scale 日本史上造成最大灾情之地震发生在东京和横滨间的关岛平原，强度高达芮氏7 . 9级。
On may 21 , 2003 , a strong earthquake measuring 6 . 7 on the richter scale devastated the city of boumerdes , 50 km east of algiers , the capital of algeria 5月21日，阿尔及利亚首都阿尔及尔以东50多公里处的布米尔达斯市，发生了芮氏规模6
Spitak earthquake : in armenia an earthquake 6 . 9 on the richter scale kills nearly 25 , 000 , injures 15 , 000 and leaves 400 , 000 homeless 1988年的斯皮塔克地震：美国的一次里氏6 . 9级的地震造成近2万5千人丧生， 1万5千人受伤和40万人无家可归。
Two weeks ago ruichang city in jiangxi province was hit by an earthquake measuring 5 . 7 on the richter scale . it killed 18 people and left hundreds homeless 两周前，江西省瑞昌市遭遇了一场里氏5点7级的地震，有18人丧生，数百人无家可归。
On may 21 , 2003 , a strong earthquake measuring 6 . 7 on the richter scale devastated the city of boumerdes , 50 km east of algiers , the capital of algeria 5月21日，阿尔及利亚首都阿尔及尔以东50多公里处的布米尔达斯市，发生了芮氏规模6
In september 1999 , an earthquake measuring 5 . 9 on the richter scale struck athens , killing at least 143 people and leaving 60 , 000 people homeless 报道说， 1999年9月，雅典曾发生过一次里氏5 . 9级的地震，当时导致143人死亡，大约6万人无家可归。
Although large earthquakes are customarily re ported on the richter scale , scientists prefer to de scribe earthquakes greater than 7 . 0 on the moment magnitude scale 尽管大地震常以里氏震级来报道，但科学家喜欢用力矩量级来描述大于7 . 0级的地震。
