Sun today 30 Sept. Hazy sunshine again this morning but a pleasantly warm sunny day spent afternoon walking in the higher Staffordshire Moorlands 10 miles SE of here looking for Bronze Age tumuli around Grindon...superb countryside and at night one of the darkest areas of the Peak District. In white light AR2175 is leaving the NW limb. Further south, AR2172 wont be long following its mate over the limb. Both of these sunspots are now heavily foreshortened and detail is becoming lost. In the eastern hemisphere AR2177 continues to develop slowly. AR2178 is little changed with its deformed leading component still showing a chunk missing from its SE edge or possible the splitting off of a separate umbra and penumbra. Flanking SE and SW respectively from here, AR2179 is little changed but a new spot is developing, as yet unnumbered. In the PST extensive plage is associated with the departing AR2172. An even brighter patch is seen due south of AR2179 in the SE quadrant. Overall the chromosphere is quiet but note the irregular bruise surrounding AR2177. The magnificent dark filament with he trailing legs in the NW quadrant now measures some 278,000km on length, rather longer than the 210,000km of the N-S filament in the SW quadrant that has crossed the disc in the past week. There are other lesser filaments in the Se quadrant. Prominence activity is moderate with a bright pyramid on the NW limb and an arch on the E limb. On the SW limb four faint eruptive prominences form a short hearth. Just above the SE limb hangs a long irregular cloud of plasma with knots some 90,000km in length and about 25,000km above the limb.
Posted on: Tue, 30 Sep 2014 22:54:13 +0000
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