The United States Geological Survey has reported that a 7.9 earthquake has struck Costa Rica. A tsunami watch is in effect for all of the Caribbean, the Pacific Tsunami Warning Center said.

The earthquake rattled parts of the country, including the capital city, San Jose. As of press time, damage and injuries were still unknown, though the quake had a 25-mile depth. Now, geologists are concerned that a tsunami could follow in the wake of the storm.

"It is not known that a tsunami was generated," the PTWC said in a statement. "This warning is based only on the earthquake evaluation. An earthquake of this size has the potential to generate a destructive tsunami that can strike coastlines near the epicenter within minutes and more distant coastlines within hours."

Right now the watch is in effect for Caribbean countries, but that could change as well. One report stated that Hawaii could be "elevated to a watch or warning status," depending on the aftermath of the quake.

Costa Rica is not a stranger to quakes. In 2009, 13 people were killed after a 6.1 earthquake hit Poas Volcano National Park, just north of San Jose. In that case, the earthquake caused mudslides, which buried people alive.

"Today is a day of mourning for Costa Ricans," President Oscar Arias said in 2009. "These losses of life fill us with pain; our prayers will be for their families."

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Now people are using social media such as Twitter and Facebook to stay updated on the conditions in Costa Rica and express their sympathies and prayers for the people.

"Every please pray for Costa Rica. A 7.9 earthquake just occurred off their coast. Tsunami watch to follow," tweeted Gabriel.

"A 7.9 earthquake just hit Costa Rica and a tsunami warning is in effect. Everyone pray for my country," added Steeze.