Advances in Geosciences www.adv-geosci.net 1680-7340 1680-7359 14 2nd EGU Alexander von Humboldt Conference "The role of Geophysics in Natural Disaster Prevention" 2008 10.5194/adgeo-14-21-2008 http://www.adv-geosci.net/14/21/2008/ http://www.adv-geosci.net/14/21/2008/adgeo-14-21-2008.html http://www.adv-geosci.net/14/21/2008/adgeo-14-21-2008.pdf 21 24 2008-01-02 Geomagnetic anomalies observed at volcano Popocatepetl, Mexico A. Kotsarenko V. Grimalsky R. Pérez Enríquez V. Yutsis S. Koshevaya J. A. López Cruz-Abeyro C. Valdez-Gonzalez R. A. Villegas Cerón Centro de Geociencias en Juriquilla, UNAM, Apdo Postal 1-742, Centro Queretaro, Querétaro, C.P. 76001, Mexico UAEM, Cuernavaca, Morelos, Mexico UANL, Facultad de Ciencias de la Tierra, , Linares, Nuevo León, Mexico Instituto de Geofisica, UNAM, Mexico D.F., Mexico Results of the ULF geomagnetic monitoring of the volcano Popocatepetl (Mexico) and their analysis are summarized and presented for the period 2003–2006. Our analysis reveals some anomalies which are considered to be of local volcanic origin: the EM background in the vicinity of the volcano was found to be significantly noisier than at other reference stations; sporadic strong noise-like geomagnetic activity was observed in the H-component; some geomagnetic pulsations were observed only at the Tlamacas station (located at 4 km near the volcano). The results are discussed in terms of a physical mechanism involving the presence of a second magmatic chamber within the volcano and, finally, further perspective directions to study volcanic geodynamical processes besides the traditional ones are given. Batygin, V. and Toptygin, I.: Problems in Electrodynamics, N.Y., Academic Press, 574 pp., 1978. Chi, P. J. for the McMAC Team.: Observations by Mid-continent Magnetoseismic Chain (McMAC) and their use in space weather research, Proceedings of the 36th COSPAR Scientific Assembly, Beijing, China, 16–23 July, A02530, http://www.cosis.net/abstracts/COSPAR2006/02530/COSPAR2006-A-02530-1.pdf, 2006. Currenti, G., Del~Negro, C., Lapenna, V., and Telesca, L.: Multifractality in local geomagnetic field at Etna volcano, Sicily (southern Italy), Nat. Hazards Earth Syst. Sci., 5, 555–559, 2005. Enomoto, Y., Hashimoto, H., Shirai, N., Murakami, Y., Mogi, T., Takada, M., and Kasahara, M.: Anomalous geoelectric signals possibly related to the 2000 Mt. Usu eruption and 2003 Tokachi-Oki earthquakes, Phys. Chem. Earth, 31, 319–324, 2006. Fujinawa, Y., Matsumoto, T., Iitaka, H., Takahashi, K., Nakano, H., Doi, T., Saito, T., Kasai, N., and Sato, S.: Earliest detection of magma movements by measuring transient streaming potential, Phys. Chem. Earth, 31, 223–233, 2006. Hata, M., Takumi, I., and Yasukawa, H.: Electromagnetic-wave radiation due to diastrophism of magma dike growth in Izu-Miyake volcanic eruptions in Japan in 2000, Nat. Hazards Earth Syst. Sci., 1, 43–51, 2001. Juárez, A., Gay, C., and Flores, Y.: Impact of the Popocatepetl's volcanic activity on the air quality of puebla City, Mexico, Atmósfera, 57–69, 2005. Kagiyama, T., Utada, H., and Yamamoto, T.: Electromagnetic structure ang magma ascending process, in: Unzen volcano: The 1990–1992 Eruption, (Ed) Ohta, K., Nishinippon and Kyushu, Univ. Press, Fukuoka, 74–79, 1995. Kopytenko, Yu. and Nikitina, L.: ULF oscillations in magma in the period of seismic event preparation, Phys. Chem. Earth, 29, 459–462, 2004. Kotsarenko, A., Grimalsky, V., Perez Enriquez, R., et al.: Volcano Popocatepetl, Mexico: ULF geomagnetic anomalies observed at Tlamacas station during March–July, 2005, Nat. Hazards Earth Syst. Sci., 7, 103–107, 2007. Macías Vázquez, J. L., Carrasco N\'uñez, G., Delgado Granados H., et al.: Mapa de peligros del volcán Popocatepetl, Instituto de Geofísica, UNAM, Mexico, http://tornado.cenapred.unam.mx/es/Instrumentacion/InstVolcanica/MVolcan/ImagenesMVolcan/mapaPeligrosA.jpg, 1995. Martin-Del Pozzo, A. L., Cifuentes-Nava, G., and Cabral-Cano, E.: Volcanomagnetic signals during the recent Popocatepetl (Mexico) eruptions and their relation to eruptive activity, J. Volc. Geoth. Res., 113, 415–428, 2002. Z\'uñiga, R. D. M. and Valdés C.: Se esta Formando una segunda Camara magmatica en el popocatepetl? Analisis de la variacion espacial de los valores b bajo el edificio volcanico, GEOS 27(1), 113, http://www.ugm.org.mx/raugm/docs/geos27-1b.pdf, 2007.