Predicting the Arrival Time of Shock Passages at Earth

Details Predicting the Arrival Time of Shock Passages at Earth Predicting the Arrival Time of Shock Passages at Earth

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005soph..227..371w&link_type=abstract

Solar Physics, Volume 227, Issue 2, pp.371-386

Physics

15

Scientific paper

The purpose of this parametric study is to predict the arrival time at Earth of shocks due to disturbances observed on the Sun. A 3D magnetohydrodynamic (MHD) simulation code is used to simulate the evolution of these disturbances as they propagate out to 1 AU. The model in Han, Wu and Dryer (1988) uses solar data for input at 0.08 AU (18 solar radii). The initial shock speed (ISS) is assumed to be constant from the corona to 0.08 AU. We investigate how variations of this ISS affect the arrival times of the shock at Earth. This basic parametric study, however, does not consider inhomogeneous background solar wind structures such as corotating interaction regions and their precursor stream stream interactions, nor interplanetary manifestations of complex coronal mass ejecta such as magnetic clouds. In the latter case, only their associated shocks are considered. Because the ambient (pre-existing background) solar wind speed is known to affect the shock arrival time at 1 AU, we also simulated events with various background solar wind speeds (BSWS) to investigate this effect. The results show that the shock arrival time at Earth depends on the BSWS, the speed of solar disturbances, their size, and their source location at the Sun. However, it is found that for a sufficiently large momentum input, the shock arrival time at Earth is not significantly affected by the pre-existing solar wind speed.

Affiliated with

Also associated with

No associations

Rating

Predicting the Arrival Time of Shock Passages at Earth does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Predicting the Arrival Time of Shock Passages at Earth, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Predicting the Arrival Time of Shock Passages at Earth will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1555014