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U.S. DEPARTMENT OF THE INTERIOR EARTHQUAKE SUMMARY MAP XXX U.S. GEOLOGICAL SURVEY M5.9 Lac Kivu, Democratic Republic of Congo, Prepared in cooperation with the Global Seismographic Network

Lac Kivu, DRC Earthquake of 3 February 2008 Epicentral Region 03 February 2008 7:34:12 UTC

28° 30° 32° 34° 36° 2.317° S., 28.879° E. Jinja Depth 10 km 1928 M6.9 Mw = 5.9 (USGS)

0° Kisumu 0° Five people killed at Bukavu, Congo (symbol obscured Nakuru by earthquake symbol.) Ten people killed in western and thirteen killed in Nyamesheke district. Tectonic Setting Over three hundred injured across the region. 20° 30° 40° S A U D I 50° Q A T A R Lake Victoria Medina Tectonic Summary A R A B I A U . A . E . The earthquake occurred in the Western Rift of the East African rift system. The East African rift system is a diffuse, Jeddah S a h a r a Mecca approximately 3000-km-long, zone of crustal extension that passes through eastern from and on the 20° 20° north to on the south and that constitutes the boundary 2° 2° between the Africa plate on the west and the plate on RWANDA A R A B I A the east. At the earthquake's latitude, the Africa and Somalia Predicted Shaking P L A T E plates are spreading apart at a rate of about four millimeters per year. The earthquake occurred near Lake Kivu, the basin of 1915 Omdurman which was created by normal faulting similar to that which San'a E N C H A D E R I T R E A M produced the February 3 earthquake. The largest earthquake to 2007 Swarm E 1967 have occurred in the rift system since 1900 had a magnitude of Y Bujumbura S U D A N 1959 about 7.6. The epicenter of the February 3, 2008, earthquake is Aden within several tens of kilometers of the epicenter of a Ndjamena magnitude 6.2 earthquake that killed two people in Goma in S a h e l Djibouti e October 2002. Earthquakes within the East African rift system D J I B O U T I 4° 4° n occur as the result of both normal faulting and strike-slip A F R I C A e o 10° Z 10° faulting. P L A T E n 1906 e r E ToH I O P I A u C E N T R A L t c A F R I C A N A a DEM. REP Z I r R E P U B L I C L F of the 1990 A n CONGO 1990 e t M EXPLANATION O w 1912 L. Turkana O f S Main Shock 6° 6° A E Q U A T O R I A L i D 2005 M6.8 G U I N E A 1966 N O Kisangani A Aftershocks G 1928 K E N Y A 0° G U R 0° N Nairobi Large Rift events

O D E M O C R A T I C L. Victoria S o m a l i R W A N D A Earthquake Magnitude C R E P U B L I C B a s i n O F T H E a B U R U N D I C O N G O Mombasa < 5 28° 30° 32° 34° 36° Kinshasa c S O M A L I A 5 - 5.4 Scale 1:4,500,000 Kananga 2005 Dar es i P L A T E L. Tanganyika Salaam S Mercator Projection Mbuji- L E 5.5 - 5.9 T A N Z A N I A E L Kilometers Mayi r H Y C 6 - 6.4 S E 0 100 200 1910 f 6.5 - 6.9 1919 1901 10° 10°

A > 7 1942 Lumumbashi C O M O R O S A N G O L A Plate Boundary Type Seismic Hazard

Ndola A L. Malawi 20° 30° 40° 50° I t R Subduction M A L A W I El Obeid Gonder Aden B A

C Transform Djibouti M s D J I B O U T I A S Dese Blantyre A Z Divergent

Lusaka G Addis a M a s c a r e n e 10° Hargeysa 10° E Harar U A Sarh Ababa D B a s i n Q Convergent Moundou

A E I Wau E T H I O P I A B M C E N T R A L Jima Z I M B A B W E M A F R I C A N A Volcanoes I 20° Bulawayo A 20° R E P U B L I C L Z A

A 2006 Fianarantsoa Bangui

O M I O

B B O T S W A N A M 1915 S I Mogadishu

M A D

A i n N Mbale s O Kisangani A Kampala N Mbandaka G K E N Y A a G Jinja Kisumu Johannesburg 0° U 0° B Nakuru N S W A Z I L A N D r Significant Earthquakes Mag >= 6.8 Nairobi a O D E M O C R A T I C c Kigali R W A N D A N a t a l C R E P U B L I C s Year Mon Day Time Lat Long Dep Mag Mwanza B a s i n a 1901 03 16 1156 -10.000 40.000 0 6.9 Bandundu O F T H E Bujumbura Arusha Moshi 1932 u g B U R U N D I Mombasa t a a 1906 08 25 1347 9.000 39.000 0 6.8 C O N G O

L E S O T H O n e d 1909 04 29 2241 -35.000 53.000 0 6.8 Kigoma Tabora 30° Durban e t a 1916 30° 1910 12 13 1137 -8.000 31.000 0 7.6 Tanga a m M Kananga Dar es l 1912 07 09 0818 3.000 33.000 0 6.8 Dodoma p 1915 05 08 1342 -23.000 39.000 0 6.8 Mbuji- Zanzibar S r P Salaam L E Mayi L a 1915 09 23 0814 16.000 39.000 0 6.8 T A N Z A N I A E S O U T H A F R I C A r H c 1916 04 07 0926 -30.000 55.000 0 7.2 Y C s a e East 1919 07 08 2105 -9.834 37.343 15 6.8 S E Cape Port E c g London 1928 01 06 1931 0.155 35.748 15 6.9 Elizabeth s Town e d 1932 12 31 0630 -29.084 32.957 15 6.8 a u i 1942 10 09 1546 -11.538 34.646 25 6.8 10° 10° q g 1909 R i 1959 12 21 1119 13.847 51.616 35 6.8

a Agulhas b 1960 11 22 0621 -36.362 52.463 35 6.8 Lumumbashi C O M O R O S

d n Bank m 1960 1966 03 20 0142 0.842 29.873 15 7.2 A N G O L A Antsiranana a a a A 1967 11 23 0835 14.449 51.983 13.2 7.0 Ndola Pemba z i 1984

I R M 1988 o d 1984 05 17 1653 -36.240 53.602 17.5 6.9 M A L A W I B A M n 1988 02 26 0617 -37.293 47.920 9 6.8 Kabwe I 1990 05 20 0222 5.126 32.197 15 7.1 C M Nampula S 20° 30° 40° 50 ° 1990 05 24 2000 5.355 31.868 16 7.1 A t Z Blantyre Mahajanga A 2005 12 05 1219 -6.224 29.830 22 6.8 Tete DATA SOURCES REFERENCES SCALE 1:20,000,000 at the Equator s G 2006 02 22 2219 -21.324 33.583 11 7.5 E e A Kilometers U D EARTHQUAKES AND SEISMIC HAZARD Bird, P., 2003, An updated digital model of plate 0 200 400 800 w Livingstone Harare Q h I Quelimane A Toamasina USGS, National Earthquake Information Center boundaries: Geochem. Geophys. Geosyst., v. 4, t B u M IASPEI, Centennial Catalog (1900 - 1999) and no. 3, pp. 1027- 80. o 20° 30° M 40° 50° extensions (Engdahl and Villaseñor, 2002) S ScaleA 1:20,000,000 Global Seismic Hazard Assessment Program Engdahl, E.R. and Villaseñor, A., 2002, Global Seismic hazard is expressed as peak Z ground acceleration (PGA) on firm Kilometers Seismicity: 1900 - 1999, chap. 41 of Lee, W.H.K., rock, in meters/sec², expected to be 0 200 4O 00 800 PLATE TECTONICS AND FAULT MODEL and others,eds., International Earthquake and PB2002 (Bird, 2003) Engineering Seismology, Part A: New York, DISCLAIMER exceeded in a 50-yr period with a M probability of 10 percent. Peak Ground Acceleration in m/sec**2 N.Y., Elsevier Academeic Press, 932 p. BASE MAP Base map data, such as place names and political NIMA and ESRI, Digital Chart of the World boundaries, are the best available but may not be USGS, EROS Data Center Map prepared by U.S. Geological Survey current or may contain inaccuracies and therefore National Earthquake Information Center .2 .4 .8 1.6 2.4 3.2 4.0 4.8 9.8 NOAA GEBCO and GLOBE Elevation Models 2008 should not be regarded as having official significance. Not approved for release by Director USGS