地震的强度(magnitude)一般按照里氏震级(Richter Scale)划分,它是将震级范围从1到10的一种对数标度,用以表现地震放出的能量总数,是根据美国地震学家Charles Francis Richter 命名的。下面请看两个例子:
The Seismology Research Centre says the earthquake measured 3.8 on the Richter scale with an epicenter about 80 kilometers 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 tremor was placed at 5.6 on the Richter scale.
地震的震级被测定为里氏5.6级。
在这两个例子中,“地震多少级”是用级数加上on the Richter scale来表示的。我们也可以用“地震强度magnitude”来表示震级,比如:
A powerful magnitude-7.6 earthquake struck off the Solomon Islands on Monday, sending a tsunami wave crashing into the country's west coast and prompting region-wide disaster warnings.
Yesterday more than 600 soldiers reached Yingxiu township of Wenchuan - the epicenter of Monday's 7.8 magnitude quake - where not a single building was intact, Xinhua reported.