Earthquake Red Shaking Alert M 6.6, WESTERN SICHUAN, CHINA Origin Time: Sat 2013-04-20 00:02:47 UTC (08:02:47 local) PAGER o o Location: 30.31 N 102.89 E Depth: 14 km Version 4 Created: 2 weeks, 2 days after earthquake Estimated Fatalities Red alert level for economic losses. Extensive Estimated Economic Losses damage is probable and the disaster is likely widespread. Estimated economic losses are less than 1% of GDP of China. Past events with this alert level have required a national or 42% 35% 29% international level response. 26% 19% 22% 6% 6% 10% 3% Orange alert level for shaking-related fatalities. 1% Significant casualties are likely. 1 100 10,000 1 100 10,000 10 1,000 100,000 10 1,000 100,000 Fatalities USD (Millions) Estimated Population Exposed to Earthquake Shaking ESTIMATED POPULATION - -* 2,108k* 52,370k 11,464k 1,350k 167k 90k 0 0 EXPOSURE (k = x1000) ESTIMATED MODIFIED MERCALLI INTENSITY PERCEIVED SHAKING Not felt Weak Light Moderate Strong Very Strong Severe Violent Extreme

Resistant none none none V. Light Light Moderate Moderate/Heavy Heavy V. Heavy POTENTIAL Structures DAMAGE Vulnerable Structures none none none Light Moderate Moderate/Heavy Heavy V. Heavy V. Heavy *Estimated exposure only includes population within the map area. Population Exposure population per ~1 sq. km from Landscan Structures: Overall, the population in this region resides in structures that are highly vulnerable to 100°E ZhiqinZhiqin DimdaDimda 102°E 104°E earthquake shaking, though some resistant ZhiqinZhiqin DimdaDimda Jin'anJin'anJin'an ShazhouShazhouShazhou KeheKehe QiaozhuangQiaozhuang Rong'anRong'an structures exist. The predominant vulnerable Long'anLong'anLong'an building types are unreinforced brick masonry Long'anLong'anLong'an LiangshuiLiangshuiLiangshui QifoQifo SekeSekeSeke XiasiXiasi and adobe block construction.

LuhuaLuhuaLuhua LuhuaLuhuaLuhua Pu'anPu'anPu'an Historical Earthquakes (with MMI levels): Se'erguSe'erguSe'ergu BarkamBarkam JiangyouJiangyouJiangyou Date Dist. Mag. Max Shaking FengyiFengyiFengyi FengyiFengyiFengyi YongchangYongchangYongchang WenchangWenchang GanziGanzi WenchangWenchang (UTC) (km) MMI(#) Deaths JinchuanJinchuanJinchuan WeizhouWeizhou JinchuanJinchuanJinchuan ZagunaoZagunaoWeizhouWeizhou MianyangMianyang 1989-09-22 144 6.1 VIII(4k) 1 XindouXindou JiannanJiannanJiannan IVIVJiannanIVJiannanJiannan 1974-05-10 258 6.8 IX(23k) 2k YunxiYunxiYunxi DeyangDeyang YunxiYunxiYunxi DeyangDeyang TongchuanTongchuan 1973-02-06 259 7.7 IX(31k) 2k KaijiangKaijiang XianshuiXianshui MeixingMeixing TianpengTianpeng RulongRulong XianshuiXianshui 31°N Recent earthquakes in this area have caused ZhangguZhanggu ZhaozhenZhaozhen TaiheTaiheTaihe ZhaozhenZhaozhenIV TaiheTaiheTaihe secondary hazards such as landslides that ZitongZitong ChengduChengdu might have contributed to losses. VVV DongshengDongsheng PenglaiPenglaiPenglai LinqiongLinqiong LinqiongLinqiong JianchengJianchengJiancheng VIVIVI AnjuAnju TianchiTianchiTianchi YanjiangYanjiang KangdingKangding Selected City Exposure WenlinWenlin 30°N from GeoNames.org ChonglongChonglong YanchengYanchengYancheng ChonglongChonglong MMI City Population YanchengYanchengYancheng NeijiangNeijiang VI Linqiong 56k LeshanLeshan YanlingYanlingYanling RonglongRonglong ShawanShawanShawan LuochengLuocheng V Wujin < 1k ShirongShirongShirong ZigongZigong AnfuAnfu YantanYantanYantan XinmianXinmian ShapingShapingShaping YujinYujinYujin YantanYantanYantan XinmianXinmian YujinYujinYujin FushiFushiFushi V Guangsheng < 1k FushiFushiFushi FujiFujiFuji V Zitong < 1k XinshibaXinshiba MuxiMuxi 29°N MinjianMinjian LuzhouLuzhouLuzhou MinjianMinjian XinfaXinfa V Yancheng < 1k YibinYibin Jiang'anJiang'anJiang'an BaixiBaixi YuechengYuechengYuecheng XiangjiabaXiangjiaba V Suishan < 1k XiangjiabaXiangjiaba ChangningChangning ChengxiangChengxiang ChangningChangning XunchangXunchang V Chengdu 3,950k GuangmingGuangming ZhongchengZhongcheng km JinchengJinchengJincheng IV Zigong 690k XiluoduXiluodu JunlianJunlianJunlian XuyongXuyong YanjingYanjingYanjing IV Mianyang 264k 0 50 100 XinchengXincheng QiaowaQiaowa XichangXichang 28°N IV Neijiang 547k ZhaxiZhaxi CuihuaCuihua IV Yibin 242k PAGER content is automatically generated, and only considers losses due to structural damage. bold cities appear on map (k = x1000) Limitations of input data, shaking estimates, and loss models may add uncertainty. http://earthquake.usgs.gov/pager Event ID: usb000gcdd