Changes in Earth’s Magnetic Field seem to be a main cause of Volcanic-Eruptions on Earth ! These changes (or disturbances) in Earth’s Magnetic-Field can be caused either by internal processes which take place near the Core-Mantle-Boundary (CMB), or they can be caused by external events which are strong geo-magnetic-storms caused by solar wind (space-weather). The maximum impact of the external events (geo-magnetic storms) on Volcanism seems to be around +/-20%, and the impact of internal-effects seems to be around +/-30%. As internal effect the North-Magnetic Pole Shift must be mentioned, which showed a very high acceleration between 1993 and 2002. The internal-processes inside Earth’s mantle which caused this fast shift of the North-Magnetic-Pole seem to be responsible for an increase of ~30% of Earth’s Volcanism between 1997 & 2008. In this paper I want to describe the impact of the external-events, the impact of strong geo-magnetic Storms, on Earth’s Volcanic Activity. The chart of —Total Volcanic Eruptions per year- and -Strong Geomagnetic-Storms- in the time 1800-2023 clearly shows that there are sharp increases in the number of volcanic-eruptions visible, shortly after the occurence of strong geomagnetic-storms (or -storm-periods). Further there is a clearly visible correlation of sunspot-(solar-cycle)-minimas and Lows in the chart of the -Active Volcanos per year- which shows that Earth’s Volcanism is clearly influenced by strong geomagnetic-storm-periods, or by the missing of such storm-periods! During sunspot-minimas global volcanism clearly decreases be around 20% ! There is also a clear correlation of Global Volcanism (which is strongly effected by geomagnetic-effects), with HGFA-seismicity and Global Warming ! WARNING to Climatologists & Politicians!!: The sun has considerably reduced its solarwind-activity ! Since 2006 only two days with AP-values slightly >100 occured ! The sun is heating towards an extended solar-minimum with considerable lower sunspot-numbers and solarwind-activity !! This means a general colder climate on Earth as historical climate-data from the Dalton- & Maunder-Minimum clearly show. A look at the Ocean-Heat-Content-Chart (EN4) and the Geo-magnetic Ap-Index clearly shows that during the periods 1995-97 & 2006-2012 the Ocean Heat Content (0-2000m) was stagnating ! That means global warming nearly stopped !! During these periods the smoothed Ap-Index was ≤10, which means very low solarwind activity ! That’s why the impact of geomagnetic-changes (-storms) on Earth’s Climate is clearly higher than that of CO2 !! It’s a deciding factor ! That’s why we must predict the future Solar Activity !