Solar acoustic modes in period 1996-2014

Solar activity has significantly changed over the last two Schwabe cycles. After a long and deep minimum at the end of Cycle 23, the weaker activity of Cycle 24 contrasts with...在过去两个施瓦贝周期（Schwabe cycles）内，太阳活动已发生显著变化。在第23太阳活动周末期经历了漫长且强度极低的极小期后，第24太阳活动周较弱的太阳活动与……形成鲜明对比。