EARTHQUAKE SUMMARY MAP U.S. DEPARTMENT OF THE INTERIOR Prepared in cooperation with the U.S. GEOLOGICAL SURVEY Global Seismographic Network M7.3 Off the West Coast of Northern Sumatra Earthquake of 10 January 2012 C A S P I A U Z N B E K S I S Tectonic Setting Epicentral Region E T A N A E U R A S I A A Z E R B A I J A N K u n l u n F a u l t T P L A T E U R N O R T H K M K O R E A SEA OF JAPAN E N T A J I K I S T A N I S T A t N a u l h F Ubon a g T y n l t e S O U T H A H Nakhon Mashhad g Ratchathani K n K O R E A s Xining a Jinan u i n u Taejon n t a H j u n J A P A N u n o Phra Nakhon RatchaEsiXmPa LANATION M Lanzhou Qingdao Taegu Kabul Zhengzhou Y E L L O W Pusan Saraburi Srinagar Xi'an Luoyang S E A Kwangju Si Ayutthaya Peshawar H C H I N A 2009 Kita Kyushu A F G H A N I S T A N I Tavoy Rawalpindi M H Main Shock I R A N Nanjing Fukuoka C A N Samut Bangkok Hefei g E Faisalabad Amritsar in R L Ja Shanghai T g A n ) Chengdu Wuhan h a Sakhon Lahore Y C Hangzhou U Siemreab Shiraz A Chongqing Y Samut E A S T K Madras K U W A I T Delhi Nanchang C H I N A U Batdambang N Y Prakan E P Changsha A S E A R PA K I S T A N L ( B H U T A N Y A N G T Z E P Jaipur Lucknow Earthquake Magnitude e r Guiyang O s i a P L A T E n T B A H R A I N G Kanpur 1941 u l f Patna Fuzhou O OKINAWA Karachi Varanasi Kunming H Q A T A R G 5.50 - 5.99 u Taipei S PLATE l f Hyderabad o f O m Phnom a n T'aichung Pondicherry Port B A N G L A - - Bhopal D E S H I Finite Fault Model Ahmadabad Guangzhou E U . A . E . I N D I A Fangcheng T'ainan S A R A B I A Khulna Dhaka Nanning Kowloon T A I W A N N A N Blair Penh P L A T E Gang 6.00 - 6.99 Nagpur Calcutta Chittagong M Y A N M A R Hanoi Kaoshsiung ( B U R M A ) Victoria Ho Chi Minh N A M Bombay I N D I A L A O S City O e 7.00 - 7.99 P L A T E P H I L I P P I N E g Bien Hoa Pune d Distribution of the magnitude and direction of slip for subfault elements of the fault rupture model are Vishakhapatnam i Long S E A R Tan An Hyderabad Rangoon A R A B I A N u Xuyen determined from the inversion of teleseismic body waveforms and long period surface waves. Arrows P L A T E a My Tho S E A Quezon l a ≥ 8.00 N P Andaman Sea E Vinh M T H A I L A N D City Rach Gia Can indicate the amplitude and direction of slip (of the hanging wall with respect to the foot wall); the slip is also Y E - Manila P u Long e n Madras P h i l i p p i n e H h Tho colored by magnitude. The view of the rupture plane is from above. The strike of the fault rupture plane is Bangalore Bangkok V I E T N A M s A d F a u l t Earthquake Depth f I o u l f C A M B O D I A L G u BURMA y Soc A r a b i a n B a s i n I Bac Lieu e K 101 ESE and the dip is 75 NNE. The dimensions of the subfault elements are 6 km in the strike direction and P n PLATE Phnom P H I L I P P I N E S o P P h i l i p p i n e Z Trang Penh I B a s i n N 0 - 69 3.5 km in the dip direction. The rupture surface is 35 km along strike and 10 km downdip. The seismic e Gulf r Cochin Madurai u of Ho Chi S O U T H E t Nakhon Si C Thailand N c A T a h Minh City C H I N A moment release based upon this plane is 8.71e+26 dyne.cm (Mw7.23). r Trivandrum H a F W R g S E A A G Thammarat E n C o S R I L A N K A L U e s 70 - 299 a A O Davao N w r Colombo l - P R 2010 O s C T A b L I e H L r a A g c c M R M S U N D AB RPU NLE IA T E a i d A O EXPLANATION d ≥ 300 g L S e i Medan M A L D I V E S v A C e l e b e s W e s t C a r o l i n e S u m a t r a F a u l t CAROLINE e Y B a s i n Kuala Lumpur I A B a s i n Kandy S S P PLATE I Y Songkhla A l A a L A t M i d - I n d i a n M MM aa ii nn SS hh oo cc kk e Singapore S I N G A P O R E Colombo a B a s i n N u E W GUINE A TR EN Yala Kota MOLUCCA SEA BIRD'S HEAD CH Alor S o m a l i SER Distance Along Strike (km) I N D O N E S I A AM T -40 -30 -20 -10 0 10 20 30 40 B a s i n PLATE RE PLATE Setar Baharu Palembang NC Galle H Mag ≥ 7.0 Makassar Kuala Epicentral Region Jakarta BANDA SEA Banda Aceh Pinang M Terengganu S I E n Semarang S O M AL L I A MAOKE 0 - 69 km v PLATE E i Bandung H H e e Y C d Surabaya G PLATE s SPE L A T E g U t - O d i TIMOR-LESTE R g I i S R T 70 - 299 a O n TIM Ipoh R U t N M o d D t a r A s i s ( J c R AV a a A 300 - 600 a ) i T R r EN Kuantan d C H e E n g n TIMOR e e y P PLATE New Port R t l RPlate Boundary a N o r t h e t Medan i A e A u s t r a l i a n Kuala n a -10 0 10 C d B a s i n u O s b o r n i S g P l a t e a u A N G Subduction Lumpur e Distance Along Dip (km) A M a s c a r e n e D B a s i n A N O C E A N M Transform I N D I A Seremban R 2010 o d r i g u e s F. Z . M A U R I T I U S E x m o u t h Divergent P l a t e a u Melaka Wallaby Plateau 1907 2005 W h a r t o n Johor Others B a s i n 1969 Baharu Cuv ier A U S T R A L I A Plateau Singapore Slip (cm) Volcanoes e g n d i i s A U S T R A L I A R a B n 0 - 100 P L A T E r a a i c Pekanbaru s d a n g I a 100 - 200 d t s Kilometers a M a E 0 200 400 800 1,200P e r t h1,600 RELATIVE PLATE MOTIONS: B 200 - 300 r o k B a s i n e n R i d The broad red vector represents the motion of the Australia g e 2009 300 - 400 plate with respect toA tNheT APaRcCifiTcI pClaAte near the epicentral region. 1935 1943 P L A T E Padang 400 - 500 Jambi 500 - 600 600 - 700 Seismic Hazard Palembang 1928 2007 2010 Bengkulu Bombay Pune Vishakhapatnam 2007 1914 Hyderabad Rangoon Significant Earthquakes Mag >= 7.5 Year Mon Day Time Lat Long Dep Mag 1907 01 04 0519 2.000 94.500 50 7.5 Bangkok M7.3 Off the West Coast of Northern Sumatra Earthquake of 10 January 2012 1914 06 25 1907 -4.500 102.500 0 7.6 Bangalore Madras Phnom 10 January 2012 18:37:01 UTC 1928 03 09 1805 -2.954 88.801 15 7.7 Penh Ho Chi 1935 12 28 0235 -0.345 98.147 35 7.8 Minh City 2.396° N., 93.175° E.