A temblor is an earthquake or earth tremor. The word temblor first appears in 1876 and is an American word inspired by the Spanish word temblor, which means shake or tremble. The plural form may be either temblors or temblores.
A tremblor is also an earthquake or earth tremor. The word tremblor first appears in America in 1913, and seems to be a mashup of the words temblor and trembler. Many English-speakers do not consider tremblor a legitimate English word, but it is found in the Oxford English Dictionary.
A trembler is something or someone that trembles. In British English, a trembler is a fuse in an explosive device. Trembler may also be a slang term for an earthquake or earth tremor.
Examples
The federal Earthquakes Canada agency said the temblor was 236 kilometres off Port Hardy at 3:46 p.m., while the U.S. Geological Study put it at magnitude 5.2, 205 kilometres from Port Hardy. (The Times Colonist)
M6.1 temblor hits off Hokkaido, has surface intensity of 3 but poses no tsunami risk (The Japan Times)
The National University’s Volcanological and Seismological Observatory of Costa Rica (OVSICORI) registered the earthquake at a magnitude of 4.7, while RSN initially reported the temblor as being as strong as a magnitude-5.1. (The Tico Times)
Public interest has been high, especially after a tremblor in January shook pictures on the walls of homes in Fox Creek, Alta., a community in the centre of the Duvernay oil and gas field. (The Huffington Post)
That is comparable to the odds for a magnitude 8.0 earthquake on the Richter scale such as the 1906 San Francisco tremblor along the San Andreas Fault. (The Manteca Bulletin)
“I inquired about the incident from her room mates and they said she jumped out of panic caused by the trembler.” (Greater Kashmir)
If that was advanced, the engine was pretty conservative. A single-cylinder, 1,029cc, long-stroke motor, with an atmospheric inlet valve and a mechanically actuated exhaust valve, it produced 6bhp at 900rpm and was produced in-house by Vauxhall, along with the trembler coil ignition and spray carburettor. (The Telegraph)