Such remote earthquakes are small and pose no danger to people or structures, the researchers said, but they do raise profound questions about the causes of earthquakes and the hidden structures within the earth's crust.

Among other things, the report warned of the threat that periodic earthquakes pose to Umbria.

Underwater earthquakes pose a threat of generating tsunamis which could have a devastating effect on the Caribbean islands.

The earthquake posed a threat to all of Bandar Abbas' oil companies, as well as at least one highly productive and expensive refinery at the time of the earthquake.

The earthquake has posed a challenge to the Karzai administration, which was struggling before the quake to carry out the most routine functions of government.

Also, there is evidence that earthquakes pose a threat to the country.

Despite the fact that Kansas is not seismically active, a strong earthquake could pose significant threats to the state.

They disregarded earlier warnings from outside watchdog groups that earthquakes posed a significant safety risk to the nuclear plants, and by doing so they "effectively betrayed the nation's right to be safe from nuclear accidents."

Such earthquakes pose a significant threat to life in the area through earthquakes and also tsunamis.

Frequent earthquakes and seismic surveys being undertaken by the Oil and Natural Gas Corporation are posing a threat to Assam's 18th century amphitheatre Rang Ghar.