FLOW AROUND SUNSPOTS FROM P-MODE FREQUENCY-SHIFT MEASUREMENTS

We use five-day helioseimic data from the Taiwan Oscillation Network t o study the flow around a sunspot, NOAA 7887. The p-mode oscillations in an annular region centered at the sunspot are decomposed into the m odes propagating toward and away from the sunspot. We find that the fr equency of an outgoing mode is greater than that of the corresponding incoming mode. This indicates that the plasma is flowing outward from the sunspot. The outflow velocity is estimated to be about 40-80 m s(- 1).