When a neutron star spins very fast, you get a pulsar, which emanates radiowaves that we can detect with radio telescopes. When these tiny mountains collapse, the moment of inertia changes and the star spins a tiny bit faster. In the radio emanations, the timing of the pulsar very suddenly shifts, and we call those "glitches".
https://arxiv.org/abs/1806.01521
Pulsars can spin very fast, and aggregate in big globular clusters, which are thought to be the remenant cores of old galaxies that were captured by our galaxy. If you convert their radio pulses to sound, the result is quite amazingly annoying. I recommend playing at full volume in the office to spread the joys of astrophysics to everyone!
My former boss worked on this cluster https://www.youtube.com/watch?v=IDx14fSCWIg
Nothing to do with electricity or temperature.
I’m curious how much potential energy is stored in such a “mountain”. Tens of centimeters is massive; I’m sure the amount of energy must be enormous.