Sentence examples for lowest solar activity from inspiring English sources
They appear at a rate of up to 10 per hour in RHESSI observations of 3 15 keV X-rays, occurring even during the periods of lowest solar activity so far in the mission.
In addition, Olwendo et al. (2012b) reported that the IRI-2007 TEC is too high for all seasons except for the March equinox (where there seems to be good agreement between observation and model) during the lowest solar activity phase (2009 2010).
During periods of low solar activity, the auroral zones shift poleward.
Earlier modelling of a period of prolonged low solar activity in the 17th and 18th centuries showed similar patterns.
But most people have never heard of space weather, which is a problem, because both high and low solar activity have serious effects on life on Earth.
These conditions looked similar to those seen in the past two cold European winters which occurred at a time of low solar activity.
It appears to be due to some combination of internal factors (more global warming going into the oceans), external factors (relatively low solar activity and high volcanic activity), and an underestimate of the actual global surface warming.
For example, aerosols (particulates released from volcanoes and from burning coal and diesel that cause cooling by reflecting sunlight) and low solar activity over the past decade likely played a role as well.
The maximum became prominent under low solar activity.
Data were collected from 1968 to 1975 (high to low solar activity).
