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Incluye trabajos presentados en eventos científicos (resúmenes de conferencias, presentaciones).
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Item Open Access AMISR contributions to equatorial aeronomy(Instituto Geofísico del Perú, 2004) Hysell, D. L.; Chau Chong Shing, Jorge LuisPresentación incluida en CEDAR (Coupling, Energetics and Dynamics of Atmospheric Regions) Workshop for 2004 (Santa Fe, Nuevo México, 2004).Item Restricted Jicamarca science highlights(Instituto Geofísico del Perú, 2005) Chau Chong Shing, Jorge Luis; Farley, Donald; Hysell, David; Swartz, Wesley; Woodman Pollitt, Ronald FranciscoConferencia presentada para la: National Science Foundation's Upper Atmospheric Facilities (NSF/UAF). Cornell University, 2005Item Restricted Jicamarca antenna arrays: systems and science(Instituto Geofísico del Perú, 2005) Woodman Pollitt, Ronald FranciscoPonencia preparada para la: Swedish Institute of Space Physics (Institutet för Rymdfysik, IRF).Item Open Access Equatorial ionospheric profiles: a comparative study between IRI model and measurements over Jicamarca(Instituto Geofísico del Perú, 2005-10-22) Ilma, R. R.; Chau Chong Shing, Jorge LuisPresentación oral ofrecida en el XXVlllth URSI General Assembly 2005, New Delhi, 23-29 October 2005. 56.Item Open Access Seismic monitoring of 2006 Ubinas volcano eruption(EGU General Assembly, 2007) Macedo Sánchez, Orlando Efraín; Métaxian, J-P.; Ramos Palomino, Domingo A.; Araujo, S.; Taipe, EduAt the end of March 2006, Ubinas volcano (16.355º S, 70.903º W, 5672 m) considered the most active volcano of Peru during the last 450 years begun a new eruption process which is lasting until present. The Geophysical Institute of Peru (IGP) with the cooperation of the Institut de Recherche pour le Developpement (IRD-France) has carried out the monitoring and surveillance of seismic activity associated to this eruptive process, at the beginning by 2 digital broadband portable seismic stations and later by a network of 3 digital 1Hz stations which data is transmitted by radio telemetry to Cayma Volcanological Observatory at Arequipa city. Here we present the main characteristics about the evolution of the seismicity during this eruptive process that permitted to us to distinguish, considering also the terrain observations, that there were 4 stages during the process: (1) From March 25th to June 24th : Setting up of intrusive system, openning of the eruptive conduits. During this stage the magma arrive for the first time to the surface on April 19th. The seismic signal includes a few tremors, but they increase with the time. It take place strong explosions with LP precursor events (2) From June 24th to July 16th: Open system functioning, weak flow. Seismic signal have some tremor but the explosions are numerous --until 3 par day—and they do not show LP precursor events anymore. (3) From July 16th to august 31st: Increase of eruptive flow. Seismic signals show a remarkable increase in the last of tremors and especially in their amplitude. The energy of explosions rise and LP precursors appear again. (4) From September to January: probable end of the intrusive episode; magma volume depletion. The intrusion stopped and residual magma remains surrounding the crater area. There are some phreatomagmatic explosions because rainy season. The seismic signals show very few explosions and tremors. The number of LP decrease also, and the daily cumulated energy fall down. The precursor LP events, which precede numerous explosions, were analyzed and used for to emit explosion warnings communicated to the civil protection authorities.Item Open Access Radar detection of air showers?(Instituto Geofísico del Perú, 2008) Wahl, David; Bellido, JoséPonencia presentada en el Radio Observatorio de Jicamarca.Item Open Access Inverse methods in aeronomy(Instituto Geofísico del Perú, 2008) Hysell, D. L.Diapositivas presentadas en 2008 Annual Summer CEDAR Workshop, 16-21 June 2008. Midway, Utah, USA.Item Open Access Equatorial ionospheric plasma irregularities: what have we learned from radar studies?(Instituto Geofísico del Perú, 2008) Chau Chong Shing, Jorge LuisDiapositivas presentadas en la Universidad de Clemson - United States (2008).Item Open Access What else can we learn with coherent scatter radars?(Instituto Geofísico del Perú, 2008) Chau Chong Shing, Jorge LuisDiapositivas presentadas en ISEA12, Greta, Grecia, Mayo 18-25, 2008.Item Open Access Measuring the equatorial spread F irregularity k-space spectrum with the Jicamarca radar: preliminary results(Instituto Geofísico del Perú, 2008) Chau Chong Shing, Jorge Luis; Hysell, D.L.Diapositivas presentadas en URSI General Assembly, August 7-16, 2008, Chicago, Illinois, USA.Item Open Access Full profile incoherent scatter analysis at Jicamarca(Instituto Geofísico del Perú, 2008) Hysell, D. L.; Rodrigues, F. S.; Chau Chong Shing, Jorge Luis; Huba, J. D.Diapositivas presentadas en URSI General Assembly, August 7-16, 2008, Chicago, Illinois, USA.Item Open Access Equatorial ionospheric irregularities and meteor studies using Jicamarca(Instituto Geofísico del Perú, 2008) Galindo, F.; Chau Chong Shing, Jorge LuisPonencia presentada en el Radio Observatorio de Jicamarca.Item Open Access Moment-tensor inversion of explosion events recorded on Ubinas volcano, Peru(EGU General Assembly, 2008) Monteiller, V.; O’Brien, G.S.; Metaxian, J.P.; Bean, C.J.; Macedo Sánchez, Orlando EfraínSituated in the Central Volcanic Zone (CVZ), southern Peru, Ubinas volcano (5672 m) is an active andesitic stratovolcano located 60 km east from Arequipa city. It is truncated in the upper part by a caldera 600 m in diameter. The caldera floor is a flat area lying approximately 500 m under the summit. The active crater is situated in the southern part; the bottom is 300m under the caldera floor. This is historically the most active volcano in Peru. Ubinas volcano began an eruptive phase on the 25th of March 2006. An experiment was carried out between May and September 2007 with 7 seismic stations equipped with broadband sensors (30 sec). The eruptive activity was characterized by magmatic explosions forming plumes 500m to 4000m high. The experiment recorded 91 explosive events. Location and focal mechanisms of the explosions are determined by waveform inversion. A linear inversion is performed at each point of a 3D grid located under the volcano in order to constrain the centroid position and the focal mechanism of the source. To determine the source-centroid location and source mechanism, we minimize the residual error between data and synthetics. The synthetics seismograms are calculated in homogeneous elastic medium that takes topography into account as no other structural information is available at this time.Item Open Access Jicamarca activities: Jul 2007- Jun 2008(Instituto Geofísico del Perú, 2008) Chau Chong Shing, Jorge Luis; Calle, A.Diapositivas presentadas en CEDAR 2008 Workshop, Zermatt, Utah , 16-21 June 2008.Item Open Access Lessons learned observing Farley Buneman waves at low, middle, and high latitudes(Instituto Geofísico del Perú, 2008) Hysell, D. L.; Michhue, G.; Larsen, M. F.; Pfaff, R.; Chau Chong Shing, Jorge LuisDiapositivas presentadas en: ISEA 12 - 12th International Symposium on Equatorial Aeronomy, May 18-24, 2008. Crete, Greece.Item Open Access Incoherent scatter measurements of F-region temperatures with the Jicamarca radar beam pointing perpendicular to B(Instituto Geofísico del Perú, 2008) Reyes, P.; Milla, Marco; Kudeki, E.Diapositivas presentadas en: ISEA 12 - 12th International Symposium on Equatorial Aeronomy, May 18-24, 2008. Crete, Greece.Item Open Access Jicamarca: facilidades y oportunidades de investigación científica espacial desde Tierra(Instituto Geofísico del Perú, 2008) Condori, Luis; Galindo, FreddyPonencia presentada en el Radio Observatorio de Jicamarca.Item Open Access Perp-to-B incoherent scatter measurements of F-region drifts, density, and temperatures at JRO(Instituto Geofísico del Perú, 2008) Kudeki, Erhan; Milla, Marco; Reyes, Pablo; Chau Chong Shing, Jorge Luis; Castillo, OttoDiapositivas presentadas en URSI General Assembly, August 7-16, 2008, Chicago, Illinois, USA.Item Open Access Meteor observations as a method of determining atmospheric properties(Instituto Geofísico del Perú, 2008) Bass, Elizabeth; Oppenheim, Meers; Sugar, GlennDiapositivas presentadas en: ISEA 12 - 12th International Symposium on Equatorial Aeronomy, May 18-24, 2008. Crete, Greece.Item Open Access Modeling the ISR spectrum perpendicular to B - magnetoionic effects(Instituto Geofísico del Perú, 2008) Milla, Marco; Reyes, Pablo; Kudeki, ErhanDiapositivas presentadas en 2008 Annual Summer CEDAR Workshop, 16-21 June 2008. Midway, Utah, USA.