Browsing by Autor "Edgar Ricaldi"

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    New geomagnetic field observations in the South Atlantic Anomaly region
    (National Institute of Geophysics and Volcanology, 2009) Monika Korte; Mioara Mandéa; Hans-Joachim Linthe; Anne Hemshorn; P.B. Kotzé; Edgar Ricaldi
    Three new geomagnetic observatories have been established recently around the South Atlantic geomagnetic Anomaly by GeoForschungsZentrum Potsdam(GFZ), Germany, in collaboration with other institutions. In Bolivia, the collaboration is with Universidad Mayor de San Andres, LaPaz, while Hermanus Magnetic Observatory (HMO) in South Africa has assisted with a new observatory in Namibia. The third observatory was set up on the island of St. Helena with logistical support from the IDA seismological network, University of California at San Diego, USA. All these observatories are operated remotely with a minimum amount of building infrastructure and without permanent staff. People living nearby have been trained to carry out the required absolute measurements for a few hours per week. In this paper we report on our experiences, challenges and solutions in setting up nearly automated observatories in remote locations in order to obtain high quality geomagnetic data. These new data, complemented by annual repeat station surveys in southern Africa, will provide valuable geomagnetic field information on the South Atlantic Anomaly changes in this area of extremely rapid decrease of field intensity.
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    Observaciones geomagnéticas en el observatorio de Patacamaya
    (1996) Gonzalo Gutiérrez; Edgar Ricaldi; A Cabrera; Pedro Miranda; J.L Telleria
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    Simultaneous Observation of Solar Neutrons and Effects on Terrestrial Magnetic Field in Association with a Solar Flare
    (American Institute of Physics, 2009) Wara Chamani; Rolando Ticona; Edgar Ricaldi; C. J. Solano Salinas; Jose A. Bellido; David Wahl; Óscar Saavedra
    On November 2, 2003 at 17:03:00 UT a solar flare, registered by the GOES satellite, was also recorded by the Neutron Monitor (NM64) of Cosmic Ray Laboratory at Mount Chacaltaya. This flare affected the local geomagnetic field (F): there were variations in the intensity of the horizontal component (H), declination component (D) and vertical component (Z). Variations on these components, estimated as 71 nT, 10 deg. and 19 nT, respectively, have been observed with the Patacamaya’s Geomagnetic Observatory; as well as a net increased field (F), estimated as 66 nT, recorded by the Villa Remedios Geomagnetic Observatory. The duration of the magnetic and neutron signals was approximately 40 and 54 minutes, respectively, which shows that the flare was intense and with large emission of neutrons.