Seismic and aseismic slip evolution and deformation associated with the 2009-2010 northern Malawi earthquake swarm, East African Rift

Geophysical Journal International

Volumn 191, Issue 3, 2012, Pages 898-908

  Hamiel, Y ^a   Baer, G ^a   Kalindekafe, L ^b   Dombola, K ^b   Chindandali, P ^b  

^a GEOLOGICAL SURVEY OF ISRAEL   (Israel)

^b Geological Survey Department of Malawi   (Malawi)

Author keywords

Africa; Continental tectonics: extensional; Satellite geodesy; Seismicity and tectonics; Transient deformation

Indexed keywords

AFRICA; COASTAL PLAIN; CONTINENTAL TECTONICS; COSEISMIC SLIPS; DIKE INTRUSION; EARTHQUAKE SWARMS; EAST AFRICAN RIFT; FAULT ACTIVITY; FIELD OBSERVATIONS; HIGH WATER TABLE; INTERFEROMETRIC SYNTHETIC APERTURE RADARS; LOCALIZED DEFORMATIONS; MAXIMUM SLIP; POROELASTIC; QUATERNARY SEDIMENTS; SATELLITE GEODESY; SEISMIC-MOMENT RELEASE; SURFACE RUPTURES; TRANSIENT DEFORMATION;

EARTHQUAKES; GEODETIC SATELLITES; GEOLOGIC MODELS; HYDRAULIC STRUCTURES; TECTONICS;

DEFORMATION;

DEFORMATION; DISPLACEMENT; EARTHQUAKE MAGNITUDE; EARTHQUAKE RUPTURE; EARTHQUAKE SWARM; EXTENSIONAL TECTONICS; GEODESY; SEISMIC MOMENT; SEISMICITY; SYNTHETIC APERTURE RADAR;

EAST AFRICAN RIFT; KARONGA; MALAWI;

EID: 84869081759     PISSN: 0956540X     EISSN: 1365246X     Source Type: Journal    
DOI: 10.1111/j.1365-246X.2012.05673.x     Document Type: Article

References (37)

1. Baer, G. & Hamiel, Y., 2010. Form and growth of an embryonic continental rift: InSAR observations and modelling of the 2009 western Arabia rifting episode, Geophys. J. Int., 182, 155-167.
2. Baer, G., Hamiel, Y., Shamir, G. & Nof, R., 2008. Evolution of a magma-driven earthquake swarm and triggering of the nearby Oldoinyo Lengai eruption, as resolved by InSAR, ground observations and elastic modeling, East African Rift, 2007, Earth planet. Sci. Lett., 272, 339-352.
3. Benoit, J.P. & McNutt, S.R., 1996. Global volcanic earthquake swarm database 1979-1989. U.S. Geol. Surv. Open File Report USGS OFR 96-69, 334 pp.
4. Biggs, J., Nissen, E., Craig, T., Jackson, J. & Robinson, D.P., 2010. Breaking up the hanging wall of a rift-border fault: the 2009 Karonga earthquakes, Malawi, Geophys. Res. Lett., 37, L11305, doi:10.1029/2010GL043179.
5. Byerlee, J.D., 1990. Friction, overpressure and fault normal compression, Geophys. Res. Lett., 17, 2109-2112.
6. Calais, E. et al ., 2008. Strain accommodation by slow slip and dyking in a youthful continental rift, East Africa, Nature, 456, 783-787.
7. Dulanya, Z., 2006. Geothermal resources of Malawi - an overview, in Proc. 38th Workshop on Geothermal Reservoir Eng., SGP-TR-179, Stanford University, Stanford, CA, 5pp.
8. Ebinger, C., 1989. Tectonic development of the western branch of the East African Rift system, Bull. geol. Soc. Am., 101, 885-903.
9. Fialko, Y., 2004. Probing the mechanical properties of seismically active crust with space geodesy: study of the coseismic deformation due to the 1992 Mw 7.3 Landers (southern California) earthquake, J. geophys. Res., 109, B03307, doi:10.1029/2003JB002756.
10. Fontijn, K., Ernst, G., Elburg, M.A., Williamson, D., Abdallah, E., Kwelwa, S., Mbede, E. & Jacobs, P., 2010a. Holocene explosive eruptions in the Rungwe Volcanic Province, Tanzania, J. Volc. Geotherm. Res., 196, 91-110, doi:10.1016/j.jvolgeores.2010.07.021.
11. Fontijn, K., Delvaux, D., Ernst, G, Kervyn, M., Mbede, E. & Jacobs, P., 2010b. Tectonic control over active volcanism at a range of scales: case of the Rungwe Volcanic Province, SW Tanzania; and hazard implications, J. Afr. Earth Sci., 58, 764-777.
12. Guerrieri, L. et al ., 2010. InSAR data as a field guide for mapping minor earthquake surface ruptures: ground displacements along the Paganica Fault during the 6 April 2009 L'Aquila earthquake, J. geophys. Res., 115, B12331, doi:10.1029/2010JB007579.
13. Hainzl, S., 2004. Seismicity patterns of earthquake swarms due to fluid intrusion and stress triggering, Geophys. J. Int., 159, 1090-1096.
14. Hamiel, Y., Katz, O., Lyakhovsky, V., Reches, Z. & Fialko, Y., 2006. Stable and unstable damage evolution in rocks with implications to fracturing of granite, Geophys. J. Int., 167, 1005-1016.
15. Hearn, E. & Fialko, Y., 2009. Can compliant fault zones be used to measure absolute stresses in the upper crust?, J. geophys. Res., 114, B04403, doi:10.1029/2008JB005901.
16. Jacobs, A., Sandwell, D., Fialko, Y. & Sichoix, L., 2002. The 1999 (M_w7.1) Hector Mine, California, earthquake: near-field postseismic deformation from ERS interferometry, Bull. seism. Soc. Am., 92, 1433-1442.
17. Jestin, F., Huchon, P. & Gaulier, J.M., 1994. The Somalia plate and the East Africa Rift system, Geophys. J. Int., 116, 637-654.
18. Jonsson, S., Segall, P., Pederson, R. & Bjornsson, G., 2003. Post-earthquake ground movements correlated to pore-pressure transients, Nature, 424, 179-183.
19. Li, Y.-G. & Vidale, J.E., 2001. Healing of the shallow fault zone from 1994-1998 after the M7.5 Landers, California, earthquake, Geophys. Res. Lett., 28, 2999-3002.
20. Li, Y.-G., Vidale, J.E., Aki, K., Xu, F. & Burdette, T., 1998. Evidence of shallow fault zone strengthening after the 1992 M7.5 Landers, California, earthquake, Science, 279, 217-219, doi:10.1126/science.279.5348.217.
21. Li, Y.-G., Chen, P., Cochran, E.S., Vidale, J.E. & Burdette, T., 2006. Seismic evidence for rock damage and healing on the San Andreas Fault associated with the 2004 M 6.0 Parkfield earthquake, Bull. seism. Soc. Am., 96, S349-S363, doi:10.1785/0120050803.
22. Lohman R.B. & McGuire, J.J., 2007. Earthquake swarms driven by aseismic creep in the Salton Trough, California, J. geophys. Res., 112, B04405, doi:10.1029/2006JB004596.
23. Marone, C., Scholz, C. & Bilham, R., 1991. On the mechanics of earthquake afterslip, J. geophys. Res., 96, 8441-8452.
24. McKenzie, D.P., Davis, D. & Molnar, P., 1970. Plate tectonics of the Red Sea and East Africa, Nature, 226, 243-248.
25. Okada, Y., 1985. Surface deformation due to shear and tensile faults in a half space, Bull. seism. Soc. Am., 75, 1135-1154.
26. Peltzer, G., Rosen, P., Rogez, F. & Hudnut, K., 1996. Postseismic rebound in fault step-overs caused by pore fluid flow, Science, 273(5279), 1202-1204.
27. Peng, Z. & Ben-Zion, Y., 2006. Temporal changes of shallow seismic velocity around the Karadere-Dunzce branch of the north Anatolian fault and strong ground motion, Pure appl. Geophys., 163, 567-600.
28. Ray, G.E., 1975. The geology of the Chitipa-Karonga area, Malawi ministry of agriculture and natural resources, Geol. Survey Dept. Bull., 42, 58.
29. Rice, J.R., 1992. Fault stress states, pore pressure distribution, and the weakness of the San Andreas fault, in Fault Mechanics and Transport Properties of Rocks, pp. 476-503, eds Evans, B. & Wong, T.-f., Academic Press, San Diego, CA.
30. Rosen, P.A., Henseley, S., Peltzer, G. & Simons, M., 2004. Updated repeat orbit interferometry package released, EOS, Trans. Am. geophys. Un., 85, 35.
31. Savage, J.C. & Hastie, L.M., 1969. A dislocation model for the Fairview Peak, Nevada, earthquake, Bull. seism. Soc. Am., 59, 1937-1948.
32. ω= 7.3 Landers earthquake, southern California, J. geophys. Res., 102(B4), 7565-7577, doi:10.1029/97JB00210.
33. Spicak, A. & Horalek, J., 2001. Possible role of fluids in the process of earthquake swarm generation in the West Bohemia/Vogtland seismoactive region, Tectonophysics, 336, 151-161.
34. Stamps, D.S., Calais, E., Saria, E., Hartnady, C., Nocquet, J-M., Ebinger, C. & Fernandes, R.M., 2008. A kinematic model for the East African Rift, Geophys. Res. Lett., 35, L05304, doi:10.1029/2007GL032781.
35. Vidale, J.E., Boyle, K.L. & Shearer, P.M., 2006. Crustal earthquake bursts in California and Japan: their patterns and relations to volcanoes, Geophys. Res. Lett., 33, L20313, doi:10.1029/2006GL027723.
36. Vidale, J.E. & Li, Y.-G., 2003. Damage to the shallow Landers fault from the nearby Hector Mine earthquake, Nature, 421, 524-526.
37. Wright, T.J., Ebinger, C., Biggs, J., Ayele, A., Yirgu, G., Keir, D. & Stork, A., 2006. Magma-maintained rift segmentation at continental rupture in the 2005 Afar dyking episode, Nature, 442, 291-294.