HR: 0800h
AN: SA51B-0236 [Abstracts]
TI: Simulation of Solar Events Using the HAF Solar Wind and
Magnetic Cloud Models
AU: * Sun, W
EM: sun@jupiter.gi.alaska.edu
AF: Geophysical Institute, University of Alaska Fairbanks, 903 Koyukuk Dr., Fairbanks, AK 99775
United States
AU: Deehr, C
EM: cdeehr@gi.alaska.edu
AF: Geophysical Institute, University of Alaska Fairbanks, 903 Koyukuk Dr., Fairbanks, AK 99775
United States
AU: Fry, C D
EM: gfry@expi.com
AF: Exploration Physics International Inc., Suite 37-105 6275 University Suite 37-105 6275 University Dr.
, Huntsville, AL 35806
United States
AU: Dryer, M
EM: murray.dryer@noaa.gov
AF: NOAA Space Environment Center
, 325 Broadway Ave
, Boulder
, CO 80305
United States
AU: Smith, Z
EM: zdenka.smith@noaa.gov
AF: NOAA Space Environment Center
, 325 Broadway Ave
, Boulder
, CO 80305
United States
AU: Akasofu, S
EM: sakasofu@iarc.uaf.edu
AF: International Arctic Research Center
, 930 Koyukuk Drive
, Fairbanks, AK 99775
United States
AB:
An interplanetary shock is often followed by a magnetic cloud. It is believed that magnetic clouds are related to halo-CMEs
observed by SOHO/LASCO. Flare and erupting filament observations are used to locate the source on the solar surface. The
Hakamada-Akasofu-Fry (HAFv2) solar wind model is used to calculate the shock arrival time, which can then be compared to
shocks observed near Earth for the event on May 12, 1997. In order to fit the observed IMF configuration in the magnetic
cloud that follows a shock, a magnetic cloud model is made and the force-free magnetic field model is applied inside the
cloud. The velocity of the cloud is obtained on the basis of the average velocity of the shock from the HAF model. A
three-dimensional configuration of interplanetary magnetic field lines, including the magnetic cloud, is obtained as a
function of time. The simulated IMF using the combined models is in good agreement with solar wind observations near Earth.
Several other examples are examined in the same way.
DE: 7519 Flares
DE: 7524 Magnetic fields
DE: 2111 Ejecta, driver gases, and magnetic clouds
DE: 2134 Interplanetary magnetic fields
DE: 2139 Interplanetary shocks
SC: SPA-Aeronomy [SA]
MN: 2004 AGU Fall Meeting