"NASA scientists are warning that the sun may be "waking up" from a brief period of relative inactivity, contradicting past assumptions about our home star. If true, this could mean that decades of potentially dangerous space weather are in store. The sun follows a roughly 11-year cycle of solar activity that begins with a prolonged quiet period, known as solar minimum, and builds toward an explosive peak, known as solar maximum — when our home star frequently spits out powerful solar storms at us. This pattern is known as the "sunspot cycle," because the number of dark patches on the sun's surface rises and falls with solar activity. The sunspot cycle is, in turn, governed by a longer 22-year cycle, known as the Hale Cycle — during which the sun's magnetic field entirely fiips and then reverses back again. But in addition to the sunspot and Hale cycles, the sun also experiences long-term fluctuations in solar activity that can span multiple decades and are much harder to predict or explain. Examples include periods between 1645 to 1715, known as the Maunder Minimum, and between 1790 and 1830, known as the Dalton Minimum, when solar activity was generally much lower throughout successive sunspot cycles. In a new study, published Sept. 8 in The Astrophysical Journal Letters, researchers analyzed multiple metrics of solar activity, including solar wind, magnetic field strength and sunspot numbers, and found that they have been on an upward trend since around 2008, and could rise further over future cycles, suggesting that the solar minimum theory is well and truly dead."Back in the early 2000s, downward trending solar activity led some scientists to believe that we were possibly entering a new "deep solar minimum." This theory gained traction after the last solar maximum, between 2013 and 2014, which was much weaker than previous cycles. However, the current sunspot cycle, which has just peaked, has massively upended this theory. In a new study, published Sept. 8 in The Astrophysical Journal Letters, researchers analyzed multiple metrics of solar activity, including solar wind, magnetic field strength and sunspot numbers, and found that they have been on an upward trend since around 2008, and could rise further over future cycles, suggesting that the deep solar minimum theory is well and truly dead.'The sun is slowly waking up': NASA warns that there may be more extreme space weather for decades to come
"NASA scientists are warning that the sun may be "waking up" from a brief period of relative inactivity, contradicting past assumptions about our home star. If true, this could mean that decades of potentially dangerous space weather are in store. The sun follows a roughly 11-year cycle of solar activity that begins with a prolonged quiet period, known as solar minimum, and builds toward an explosive peak, known as solar maximum — when our home star frequently spits out powerful solar storms at us. This pattern is known as the "sunspot cycle," because the number of dark patches on the sun's surface rises and falls with solar activity. The sunspot cycle is, in turn, governed by a longer 22-year cycle, known as the Hale Cycle — during which the sun's magnetic field entirely fiips and then reverses back again. But in addition to the sunspot and Hale cycles, the sun also experiences long-term fluctuations in solar activity that can span multiple decades and are much harder to predict or explain. Examples include periods between 1645 to 1715, known as the Maunder Minimum, and between 1790 and 1830, known as the Dalton Minimum, when solar activity was generally much lower throughout successive sunspot cycles. In a new study, published Sept. 8 in The Astrophysical Journal Letters, researchers analyzed multiple metrics of solar activity, including solar wind, magnetic field strength and sunspot numbers, and found that they have been on an upward trend since around 2008, and could rise further over future cycles, suggesting that the solar minimum theory is well and truly dead."Back in the early 2000s, downward trending solar activity led some scientists to believe that we were possibly entering a new "deep solar minimum." This theory gained traction after the last solar maximum, between 2013 and 2014, which was much weaker than previous cycles. However, the current sunspot cycle, which has just peaked, has massively upended this theory. In a new study, published Sept. 8 in The Astrophysical Journal Letters, researchers analyzed multiple metrics of solar activity, including solar wind, magnetic field strength and sunspot numbers, and found that they have been on an upward trend since around 2008, and could rise further over future cycles, suggesting that the deep solar minimum theory is well and truly dead.'" The sun is slowly waking up': NASA warns that there may be more extreme space weather for decades to come