昨天晚上9点多，有消息重庆市人民政府公告，新华网上消息汶川震区附近可能发生6至7级余震，四川的电视台，广播都在播送这条消息，然后很多学生都到室外去住去了，学校也紧急停课一天（20号）。
以下是来自USGS网站上的数据：
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Magnitude 4.5
Date-Time: Tuesday, May 20, 2008 at 00:57:36 UTC
Tuesday, May 20, 2008 at 08:57:36 AM at epicenter
Location: 31.631°N, 104.145°E
Depth: 10 km (6.2 miles) set by location program
Region: EASTERN SICHUAN, CHINA
Distances: 60 km (40 miles) WNW of Mianyang, Sichuan, China
105 km (65 miles) N of Chengdu, Sichuan, China
325 km (200 miles) NW of Chongqing, Chongqing, China
1440 km (890 miles) SW of BEIJING, Beijing, China
Location Uncertainty: horizontal +/- 8.1 km (5.0 miles); depth fixed by location program
Parameters NST= 30, Nph= 30, Dmin=532 km, Rmss=0.44 sec, Gp=112°,
M-type=body magnitude (Mb), Version=Q
Source USGS NEIC (WDCS-D)
Event ID us2008sgab
Location on Map
Historic Seismicity
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Magnitude 5.2
Date-Time Monday, May 19, 2008 at 17:52:33 UTC
Tuesday, May 20, 2008 at 01:52:33 AM at epicenter
Location 32.233°N, 105.035°E
Depth 10 km (6.2 miles) set by location program
Region SICHUAN-GANSU BORDER REGION, CHINA
Distances 75 km (50 miles) WSW of Guangyuan, Sichuan, China
90 km (55 miles) NNE of Mianyang, Sichuan, China
330 km (205 miles) NNW of Chongqing, Chongqing, China
1335 km (830 miles) SW of BEIJING, Beijing, China
Location Uncertainty horizontal +/- 4.8 km (3.0 miles); depth fixed by location program
Parameters NST=116, Nph=116, Dmin=476.4 km, Rmss=0.82 sec, Gp= 43°,
M-type=body magnitude (Mb), Version=Q
Source USGS NEIC (WDCS-D)
Event ID us2008sfbp
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Magnitude 5.1
Date-Time Monday, May 19, 2008 at 06:06:54 UTC
Monday, May 19, 2008 at 02:06:54 PM at epicenter
Location 32.434°N, 105.343°E
Depth 10 km (6.2 miles) set by location program
Region SICHUAN-GANSU BORDER REGION, CHINA
Distances 45 km (30 miles) W of Guangyuan, Sichuan, China
120 km (75 miles) NNE of Mianyang, Sichuan, China
340 km (210 miles) NNW of Chongqing, Chongqing, China
1290 km (800 miles) SW of BEIJING, Beijing, China
Location Uncertainty horizontal +/- 9.9 km (6.2 miles); depth fixed by location program
Parameters NST= 72, Nph= 72, Dmin=>999 km, Rmss=1.17 sec, Gp= 68°,
M-type=body magnitude (Mb), Version=7
Source USGS NEIC (WDCS-D)
Event ID us2008sfav