fl229.watari06 Posted: 24-Feb-96 Updated: 18-May-96 Events specified: LDE on 14-Oct-95
S. Watari (Communications Research Lab.) Z. Smith, T. Detman, P. McIntosh, and M. Dryer (NOAA/Space Environment Lab.) Mano (Meudon Observatory)
A large magnetic loop was observed by the SXT on 14 Octorber 1995. This event was associated with a long duration soft X-ray event ovserved by GOES and seems to be a souce of the interplanetary disturbance on 18 Octorber 1995. This is an important event as a case study on a solar source of the interplanetary disturbance. We will gather optical and radio data and compare them with our modeling wotk.
Update 18-May-96
We will submit a paper on this subject.
Journal : Solar Physics
Title : Identification of the Solar Source for the 18 October 1995 Magnetic Cloud
Authors : Z. Smith, M. Dryer, P.S. McIntosh (NOAA/Space Environment Center)
S. Watari (Communications Research Laboratory)
P.K. Manoharan (Observatorie de Paris)
Abstract : It is necessary to identify signatures of solar sources in order to
improve predictions of solar-caused geomagnetic activity. This is
not a straightforward task as the relationship in not well
understood. We apply an algorithm, derived from numerical
simulations to identify the solar source of an interplanetary event
that was observed by the WIND spacecraft on October 18, 1995 and
was followed by a geomagnetic storm. From the solar observations,
no specific geomagnetic activity had been predicted at Space
Weather Operations (SWO) in Boulder, CO. The algorithm is used
to estimate the time and location of the expected solar source of
this interplanetary event. A review of solar observations prior
to the WIND observations showed that solar activity precursors
could be identified. A long-duration-event was seen by GOES in
soft X-rays at the same time as a type IV burst was observed in
metric radio wavelengths, and a rearrangement of fields was
observed by the soft X-ray imager on the YOHKOH satellite. This
suggests that algorithm is useful for post facto identification
of solar sources, and that such combinations of solar activity
should be further investigated for use in geomagnetic forecasting.