Antarctic Peninsula Greek seismicity Kamchatka Peninsula Omori epoch Orca submarine volcano PGA PGV PSHA Seymour–Marambio Island Tsallis entropy acoustic emission of near-surface rocks aftershocks sequences apparent resistivity areas of increased shear deformations atmospheric electric field complexity connected region correlation correlations day length earthquake earthquake clustering earthquake forecasting earthquake interevent times earthquake precursors earthquake prediction earthquake preparation earthquake simulator earthquakes electromagnetic anomalies