Disappearence of equatorial Es, associated with magnetic field depressions |
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Authors: | BVKrishna MurthyK Sen Gupta |
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Institution: | Space Physics Division, Space Science and Technology Centre, Trivandrum, India |
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Abstract: | The phenomenon of the sudden disappearance of equatorial sporadic E at two stations, namely, Trivandrum and Kodaikanal is studied. It is established that whenever there is a sudden disappearance of Es, there is a depression in the horizontal magnetic field (H) range. Electron velocities during the presence and absence of sporadic E have been estimated. These results show that the irregularities responsible for sporadic E are present even when the electron velocities are less than the ion thermal velocity. |
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