Habe zwar keinen h-alpha, aber bei mir kam gerade das hier rein. Ich weiß nicht, ob es damit zusammenhängt:
An active sunspot complex produced a near-major solar flare on 12
September that is suspected to have produced one and possibly two closely
spaced Earthward-directed coronal mass ejections (CMEs). Available data from
the SOHO spacecraft has been sparse and does not yet allow a coherent
analysis of the events. What data is available seems to contain the signature
of at least one full-halo (Earthward-directed) event.
The inferred velocity of the mass ejection(s) have been primarily
determined from solar radio observations of the inner-coronal shock
velocities, which have averaged near 850 kilometers per second. Assuming a
radial trajectory that is centered somewhat east of the Earth, the shock
front from the leading CME should arrive at the Earth in the late UTC hours
of 14 September or the early UTC hours of 15 September (for North America,
this corresponds to the early evenings hours of 14 September to the early
morning hours of 15 September Eastern Daylight Savings Time). The second CME
(if one exists) will be imbedded within the flow of the leading CME and may
further enhance the potential for producing auroral activity.
The impact of this disturbance has the potential to produce periods of
moderately strong auroral activity across fairly widespread middle latitude
regions. Thus, a middle latitude auroral activity watch has been issued. The
contents of the watch are included below.