Old Sunspot Records

The shape of the sunspot cycle described by sunspot areas

The temporal behavior of the sunspot cycles 12–22, as described by quarterly mean values of sunspot areas, can be represented by a single function containing only two parameters: the starting time and the amplitude of a cycle. The parameters are determined for the more recent 11 sunspot cycles and examined for any predictable behavior. As a sunspot cycle progresses, the amplitude parameter can ...

Coronal Mass Ejections from Sunspot and non-Sunspot Regions

Coronal mass ejections (CMEs) originate from closed magnetic field regions on the Sun, which are active regions and quiescent filament regions. The energetic populations such as halo CMEs, CMEs associated with magnetic clouds, geoeffective CMEs, CMEs associated with solar energetic particles and interplanetary type II radio bursts, and shock-driving CMEs have been found to originate from sunspo...

Sunspot Number Corrections

Let me try to say things a bit more clearly. Reconstruction of the EUV flux is on solid ground based on the range of the diurnal variation, rY, of the Geomagnetic East Component: The process is described

Functional Sunspot Equilibria

Consider a one step forward looking model where agents have beliefs about the law of motion of the system, and their forecast for the next period is made with knowledge of the past values of the state variable but not the current value, and is allowed to depend on the current realization of an extrinsic random process. The paper provides (and characterizes) the conditions for the existence of s...

Old Criminal Records and Predictions of Future Criminal Involvement