Status Report

Improvements of the shock arrival times at the Earth model STOA

By SpaceRef Editor
February 10, 2015
Filed under , , ,

H.-L. Liu, G. Qin

(Submitted on 4 Feb 2015)

Prediction of the shocks’ arrival times (SATs) at the Earth is very important for space weather forecast. There is a well-known SAT model, STOA, which is widely used in the space weather forecast. However, the shock transit time from STOA model usually has a relative large error compared to the real measurements. In addition, STOA tends to yield too much `yes’ prediction, which causes a large number of false alarms. Therefore, in this work, we work on the modification of STOA model. First, we give a new method to calculate the shock transit time by modifying the way to use the solar wind speed in STOA model. Second, we develop new criteria for deciding whether the shock will arrive at the Earth with the help of the sunspot numbers and the angle distances of the flare events. It is shown that our work can improve the SATs prediction significantly, especially the prediction of flare events without shocks arriving at the Earth.

Comments: Submitted to JGR

Subjects: Solar and Stellar Astrophysics (astro-ph.SR)

Cite as: arXiv:1502.01069 [astro-ph.SR] (or arXiv:1502.01069v1 [astro-ph.SR] for this version)

Submission history

From: Huilian Liu [view email] 

[v1] Wed, 4 Feb 2015 00:40:50 GMT (40kb)

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