Mini earthquakes are providing insight into hidden tectonic features beneath the earth's surface, potentially revealing lost fragments, unusual rock formations, and other buried structures. The discoveries may be linked to various locations, including northern california, bermuda, and australia, with some findings possibly explaining geological mysteries such as why certain islands have not sunk. The extent and nature of these hidden features are still being uncovered, with reports of buried tectonic plates, secret mountains, and other submerged geological formations.