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The suggestion that sunspot transition region oscillations are a typical feature of the sunspot plumes is examined. The present observations show 3 min oscillations in the umbra that end at the umbral rim. We nd that sunspot plumes located above the umbra show these oscillations, in contrast to plumes above the penumbra. These two ndings suggest that the oscillations may be a property of the umbral transition region.

Plumes and oscillations in the sunspot transition region