The flare of 1991 June 4 (importance 3B) and the associated Moreton wave

Details The flare of 1991 June 4 (importance 3B) and the associated Moreton wave The flare of 1991 June 4 (importance 3B) and the associated Moreton wave

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003rnaoj...6..101y&link_type=abstract

Report of the National Astronomical Observatory of Japan (ISSN 0915-6321), Vol. 6, No. 3 - 4, p. 101 - 115 (2003)

Astronomy and Astrophysics

Astronomy

2

Solar Flares, Solar Coronal Holes

Scientific paper

We observed a Moreton wave associated with a flare of importance 3B in the NOAA region 6659 on 1991 June 4. The Moreton wave was emitted from a flare bright point and initially showed the form of a loop. The speed of the Moreton wave was initially 1500 km s-1 and was later accelerated to 1800 km s-1. This acceleration may be due to the propagation of the wave into a coronal hole (with low density and high Alfvén velocity.

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