U.S. DEPARTMENT OF THE INTERIOR EARTHQUAKE SUMMARY MAP XXX U.S. GEOLOGICAL SURVEY Prepared in cooperation with the Global Seismographic M6.9 Northern Honshu, Japan Earthquake of 13 June 2008 Network Tectonic Setting Epicentral Region 130° 140° 150° 160° 136° 138° 140° 142° 144° Blagoveshchensk SAPPORO YUBARI Hokkaido 1993 OKHOTSK IWANAI KURIYAMA 50° 50° KUSHIRO 1961 PLATE 1993 KUTCHAN Sapporo SHIRANUKA CHITOSE H 1943 C Birobidzhan N E Hokkaido Khabarovsk R TOMAKOMAI T

A 1952 K DATE Qiqihar T CHINA Yuzhno- s A 1952 Sakhalinsk d H MURORAN i n n C s M a a A 1952 B l K s i l - r I 1915 u l L K i I r R AMUR PLATEHarbin u U K K 42° 42° HAKODATE EXPLANATION Changchun 1968 Jilin J a p a n 2003 Vladivostok B a s i n Sapporo Main Shock M6.8 1971 1945 Fushun Ch'ongjin J a p a n B a s i n Shenyang Mag ≥ 7.0 1968 Anshan Kanggye Aomori 1913 1919 0 - 69 km 1968 1917 Sinuiju Hamhung NOHEJI 1974 40° 40°70 - 299 N o r t h w e s t AJIGASAWA Aomori Dalian AOMORI N O R T H P a c i f i c 300 - 600 S e a o f J a p a n 1901 P'yongyang K O R E A S E A O F J A PA N HIROSAKI Sambongi H 1901 1994 Haeju Sendai C B a s i n 1983 HACHINOHE Kaesong N 1931 1935 Seoul E Plate Boundaries Ch'unch'on R T 1935 Inch`on Subduction ODATE 1995 S O U T H N Ch'ungju e NOSHIRO K O R E A A Qingdao P s i Taejon A Transform J A P A N J R Chonju Gifu Tokyo 1989 Taegu Kyoto y 40° 1968 40° Y E L L O W Pusan Kawasaki k 1939 Tohoku 1960 Yokohama s Divergent Kwangju Hiroshima Kobe Nagoya t S E A a AKITA 1917 DATA SOURCES Fukuoka Osaka h MORIOKA Cheju Matsuyama S MIYAKO 1928 Shimonoseki I Z Convergent 1914 1968 Nagasaki Kita U

EPICENTRAL REGION EARTHQUAKES AND SEISMIC HAZARD Kyushu T HANAMAKI R Volcanoes E KAMAISHI 1933 USGS, National Earthquake Information Center Shanghai N

C H PACIFIC PLATE NOAA, National Geophysical Data Center C H MIZUSAWA Hangzhou N E 1904 1915 1901 1902 IASPEI, Centennial Catalog (1900 - 1999) and R 30° T 30° SAKATA ICHINOSEKI E A S T ) extensions (Engdahl and Villaseñor, 2002) U Y Shinjo HDF (unpublished earthquake catalog) (Engdahl, 2003) C H I N A K TSURUOKA 1900 1981 U 1939 Y S E A R SANUMA Global Seismic Hazard Assessment Program ( OKINAWA

O PLATE 1964 FURUKAWA T 1937 O WAKUYA Naha H 1915 PLATE TECTONICS AND FAULT MODEL S 1933 SHIOGAMA ISHINOMAKI - Murakami I SENDAI PB2002 (Bird, 2003) E YAMAGATA 1936 Taipei S Sendai N Finite Fault Model, Chen Ji, UC Santa Barbara (2007) A 1978 1962 1915 N 130° 140° 150° 160° 38° NIIGATA SHIBATA YONEZAWA 1927 38° KAMEDA Scale MAKI BASE MAP RELATIVE PLATE MOTIONS 1:20,000,000 NIITSU FUKUSAIMA 1915 Kilometers Kamo Gosen NIMA and ESRI, Digital Chart of the World SANJO 1959 0 200 400 800 1,200 1,600 WAKAMATSU USGS, EROS Data Center Plate boundary symbols indicate the NAGAOKA 1905 H general pattern of relative plate motion. KASHIWAZAKI KORIYAMA C NOAA GEBCO and GLOBE Elevation Models 1938 N The Pacific Plate, however, is moving 1908 E R west-northwest relative to the Okhotsk TOGI TAKADA Shirakawa T NANAO TAIRA 1938 Plate at approximately 8.3 cm/yr. N ONAHAMA A UEDA 1938 1938 P HIMI Liyama REFERENCES UOZU A TAKAMATSU FUSHIKI Nikko 1938 J Did You Feel It? ISURUGI TAKAOKA NAGANO Numata KARASUYAMA FUKUNO TOYAMA Bird, P., 2003, An updated digital model of plate boundaries: 1948 KANAZAWA SUZAKA Kanto UTSUNMIYA Omachi MATSUSHIRO HITACHI 1938 KUJI Geochem. Geophys. Geosyst., v. 4, no. 3, pp. 1027- 80. Seismic Hazard KOMATSU UEDA MAEBASHI KIRYU Kasama 1965 FUNATSU ASHIKAGA 130° 140° 150° 160° KARUIZAWA P a c i f i c O c e a n FURUKAWA MATSUMOTO ISEZAKI SHIMODATE 1982 Tomioka TAKASAKI 1924 Engdahl, E.R. and Villaseñor, A., 2002, Global Seismicity: TAKAYAWA OKAYO KOGA Ishioka FUKUI KUMAGAYA Blagoveshchensk SUWA 1900 - 1999, chap. 41 of Lee, W.H.K., and others,eds., 36° SABAE Chubu Chino KAWAGOE NODA 1921 1923 36° 50° 50° TAKEFU OMIYA International Earthquake and Engineering Seismology, HANNO Ryugaski HACHIMAN OMIGAWA AKAHO ENZAN ICHIKAWA 1923 Part A: New York, N.Y., Elsevier Academeic Press, 932 p. AMINO KOFU Tokyo TAKO CHOSHI Birobidzhan HACHIOJI SAKURA NARUTO IWATAKI Mino AOYAGI Asahi Honshu Earthquake Khabarovsk KINOMOTO IIDA 1924 TOKYO CHIBA Miyazu OI FUJI- Yokohama Yokaichiba Engdahl, E.R., Van der Hilst, R.D., and Buland, R.P., 1998, HIGASHI- GIFU SEKI YOSHIDA KATAKAI Gifu TAJIMI 1923 13 June 2008 23:42:46 UTC Qiqihar Yuzhno- MAIZURUMAIZURU OGAKI 1923 MOBARA Global teleseismic earthquake relocation with improved trav- HIKONE KISARAZU Sakhalinsk FUKUCHIYAMA ECHIGAWA OKOSHI FUJINOMIYA HIRATSUKA FUJISAWA OHARA el times and procedures for depth determination: Bull. Seism. KATADA SETO YOKOSUKA SASAYAMA NAGOYA TOYOTA YOSHIWARAODAWARA 39.122° N., 140.678° E. KUSATSU NUMAZU Kamogawa Soc. Amer., v. 88, p. 722-743. Nagoya KARIYA SHIMIZU MISHIMA Misaki CHIKURA Depth 10 km Kyoto KYOTO HINO ATAMI 1923 Harbin Sanda YOKKAICHI FUJIEDA SHIZUOKA ITO1923 OTSU HANDA TATEYAMA Mw = 6.9 (USGS) MIKI IKEDA TOYONAKASeki OKAZAKI KAKEOAWA YAIZU TOKONAME NISHIO MATSUZAKI AKUTAGAWA TOYOHASHI SHIMADA 1923 Osaka UENO TSU ARAI KOKUBU HAMAMATSU 1974 An earthquake occurred about 85 km (50 miles) SSE KOBE NARA TOYOHAMA 1909 AKASHI OSAKA MATSUZAKA of Akita, Honshu, Japan or about 100 km (60 miles) Changchun SAKURAI 1916 1909 NAGANO ISE NNW of Sendai, Honshu, Japan or about 390 km (240 Jilin FUKE KISHIWADA Vladivostok Sapporo IZUMI- Hashimoto Kinki miles) N of TOKYO, Japan at 5:43 PM MDT, Jun 13, SANO KOYASAN 2008 (Jun 14 at 8:43 AM local time in Japan). WAKAYAMA Owase 1906 1906 1953 Shenyang Fushun Ch'ongjin KAINAN Shaking was felt over a wide region. Ten deaths Finite Fault Model 34° Gobo and 236 injuries were reported. 34° Anshan Kanggye Aomori EXPLANATION 1944 TANABE 1984 for M6.8 Earthquake Sinuiju Hamhung SHINGU 40° 40° Earthquake Magnitude Dalian P'yongyang 5.50 - 5.99 136° 138° 140° 142° 144° Wonsan Sendai FINITE FAULT MODEL Haeju 6.00 - 6.99 Scale 1:4,000,000 Kaesong Seoul Contributed by Kilometers 3 Ch'unch'on 7.00 - 7.99 Gavin Hayes, NEIC and Chen 2 Inch`on 0 100 200 400 Significant Earthquakes Mag >= 7.5 Ch'ungju Taejon Ji, University of California at Chonju Tokyo 8.00 - 8.99 Santa Barbara Taegu Gifu Year Mon Day Time Lat Long Dep Mag Kwangju Kyoto Kawasaki 1896 08 31 1706 39.500 140.700 0 7.2 Pusan Nagoya Yokohama TECTONIC SUMMARY Hiroshima Osaka Kobe 9.00 - 9.99 1901 08 09 1833 40.600 142.300 35 7.5 Distribution of the amplitude Shimonoseki Matsuyama 1906 01 21 1349 34.000 137.000 350 7.7 and direction of slip for Cheju Fukuoka Kita The Mw 6.9 Honshu earthquake of June 13th 1909 03 13 1429 34.500 141.500 35 7.6 subfault elements (small Nagasaki Kyushu Earthquake Depth ) Slip (cm) EPICENTRAL REGION rectangles) of the fault rupture 2008 occurred in a region of convergence 1915 11 01 0724 38.300 142.900 35 7.5 m k 0 - 69 ( between the Pacific Plate and the Okhotsk 1923 09 01 0258 35.405 139.084 35 7.9 model are determined from the 0 - 50 Shanghai ) inversion of teleseismic body W 70 - 299 section of the North American Plate in northern 1923 09 02 0246 34.900 140.200 35 7.6 ° 50 - 100 1931 03 09 0348 40.484 142.664 35 7.7 waveforms. Arrows indicate 5 300 - 700 Japan, where the Pacific plate is moving west- 5 1 100 - 150 30° 30° 1933 03 02 1731 39.224 144.622 35 8.4 the amplitude and direction of northwest with respect to North America at a N (

1938 05 23 0718 36.458 141.755 35 7.7 slip (of the hanging wall with 150 - 200 rate of approximately 8.3 cm/yr. The hypocenter 0 ° 1938 11 05 0843 37.009 142.045 35 7.9 respect to the foot wall); the 5 0 of the earthquake indicates shallow thrusting 2 200 - 250 1938 11 05 1050 37.108 142.081 35 7.8 slip amount is also color-coded e motion in the upper (Okhotsk) plate, above k 1938 11 06 0853 37.287 142.283 35 7.7 as shown. The view of the i r 250 - 300 t the subducting Pacific plate, which lies at 1944 12 07 0435 33.750 136.000 0 8.1 rupture plane is from above. s 130° 140° 150° 160° g 300 - 350 approximately 80 km depth at this location. 1952 03 04 0122 42.500 143.000 0 8.1 n Scale 1:20,000,000 lo Seismic hazard is expressed as peak 1953 11 25 1748 34.034 141.786 35 7.9 The strike of the fault rupture a 350 - 400 Kilometers ground acceleration (PGA) on firm 1960 03 20 1707 39.871 143.435 2.1 7.8 plane is N25E and the dip is 2 e 0 200 400 800 1,200 1,600 The earthquake occurred in a region of upper- 2 c - n 400 - 450 rock, in meters/sec², expected to be 1964 06 16 0401 38.434 139.226 13.1 7.5 a plate contraction, probably within the complicat- 49.67 NW. The dimensions of t exceeded in a 50-yr period with a 1968 05 16 0049 40.903 143.346 25.8 8.3 the subfault elements are 3 km is 450 - 500 Peak Ground Acceleration in m/sec**2 ed tectonics of the Ou Backbone Range, D probability of 10 percent. DISCLAIMER 1968 05 16 1039 41.593 142.786 11.8 7.8 in the strike direction and 2 km Dis known to have hosted several large earth- tan 500 - 550 1978 06 12 0814 38.224 142.009 53.3 7.7 Dip ce Base map data, such as place names and political in the dip direction. The 4 d quakes in historic times. The largest of these 1983 05 26 0300 40.468 139.080 20 7.7 9.6 ow boundaries, are the best available but may not be seismic moment released 7° nd

events occurred in 1896, approximately 70km 1993 01 15 1106 43.022 144.124 102 7.6 No ip ( current or may contain inaccuracies and therefore r km 0 .2 .4 .8 1.6 2.4 3.2 4.0 4.8 based on the plane is 2.466 thw ) 9 1993 07 12 1317 42.883 139.225 20.4 7.7 e 1 should not be regarded as having official significance. north of the June 13th event, and killed over E+26 dyne.cm. st - 200 people in the local area. 1994 12 28 1219 40.530 143.403 29.2 7.8 Map prepared by U.S. Geological Survey National Earthquake Information Center 18 June 2008 Map not approved for release by Director USGS