Direct Comparison of a Solar Moreton Wave, EUV Wave and CME (Preprint)
Abstract
On 2011 February 14, the ISOON telescope at the National Solar Observatory at Sacramento Peak recorded a Moreton wave associated with a 1B flare (GOES class M2 with a 1 8 maximum at 17:26 UT). The solar event was well observed by the STEREO spacecraft (both in quadrature from Earth) and SDO. The Moreton wave was first observed at 17:25 UT and propagated away from the flare site in a north-easterly direction at a speed of 730 km s 1. It displayed a characteristic down up vertical velocity pattern and lagged slightly (4 x 10000 km) behind an EUV wave observed by the Atmospheric Imaging Assembly on SDO to be travelling with essentially the same speed and trajectory. STEREO EUVI and COR1 data indicate that the fast wave was associated with the northward lateral expansion of a coronal mass ejection (CME). The radial CME speed deduced from STEREO A observations was only 580 km s 1, but STEREO EUV observations of the low corona indicate an initial lateral speed of 700 km s 1 near the time of wave onset, with the coronal portion significantly leading the surface response. A distance vs. time plot of the EUV wave along its main trajectory shows an initial fast bright wave that has a constant speed over 6 x 100000 km and reflects off an active region within its angular span, followed by a slower bright wave that becomes stationary.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 30, 2013
- Accession Number
- ADA601493
Entities
People
- Edward W. Cliver
- K. S. Balasubramaniam
- Susan White
Organizations
- Air Force Research Laboratory