Underwater volcanoes and electrical activity:

"Large "telluric currents" have been found circulating through Earth's crust because our magnetic field induces current flow in conductive strata. Thousands of amperes flow beneath the surface, varying according to conductivity. Since the Sun can affect Earth's magnetic field through geomagnetic storms, fluctuations in telluric currents can occur when there is an increase in sunspots or solar flares, because they create oscillations in the ionosphere."

... "Since magma can be considered a form of liquid plasma, it can also conduct electricity. As the ionosphere is charged up by solar flares, opposite charge is attracted to subterranean magma. Electric currents in plasma pinch down into filaments and form double layers. Electromagnetic forces between current filaments and between double layers can cause sudden pressure variations."

Anyone here can figure out the rest and connect the dots.

Sun cycle 25 is a monster. Electric Universe rules the, well, universe.

Source: https://www.timebomb2000.com/xf/index.php?threads/electric-universe-earthquakes-and-volcanoes.390205/

(Yes, Tesla knew all this).