A tremor was a geological disaster which caused seismic activity. In the 1970s, there were more than fifty thousand tremors a year throughout the Earth.
When Rao was beginning to expand, this caused violent tremors on Krypton leading to a chain reaction that led to it's destruction.
The Taj Mahal was destroyed by a tremor, but Flash rebuilt it.
At the Seismological Bureau, a getigraph is used to track tremors.
- ↑ as seen in Too Hot to Handle (1973).
- ↑ As seen in The Ultra Beam.
- ↑ As seen in The Menace of the White Dwarf, The Planet-Splitter, Secret Origins of the Superfriends, The Krypton Syndrome and The Ghost Ship.
- ↑ As seen in Too Hot to Handle (1973).
- ↑ As seen in The Ultra Beam (1973).