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       Mexico hit by magnitude 7.4 earthquake Mexico hit by magnitude 7.4 earthquake that triggered a tsunami alert for Pacific coastlines along Central America.

       The coast of southern Mexico was rattled by a powerful earthquake on Tuesday morning that killed at least one person and triggered a tsunami alert for Pacific coastlines along Central America.

       The United States Geological Survey (USGS) said the quake had a preliminary magnitude of 7.4 and struck at 11:29 a.m. ET, 7 miles west of Santa María Zapotitlán, Mexico.

       The temblor had a depth of about 20 miles and was centered along the Pacific coast of Oaxaca state near the resort of Huatulco.

       THE "RING OF FIRE' EXPLAINED

       The quake was felt in Guatemala and throughout south and central Mexico.

       A magnitude 7.4 earthquake in southern Mexico triggered a tsunami warning for the Pacific Coasts of countries in Central America. (Fox News)

       The National Weather Service's (NWS) Pacific Tsunami Warning Center (PTWC) said that "hazardous" tsunami waves from the quake were possible within 620 miles of the epicenter, along the Pacific coasts of Mexico, Guatemala, El Salvador and Honduras.

       The quake had a preliminary magnitude of 7.4 and struck southern Mexico resort of Huatulco at 11:29 a.m. ET. (Fox News)

       Tsunami waves ranging from 3 to 9 feet are possible along some coasts of Mexico, while tsunami waves of up to 3 feet are possible for Ecuador. In the rest of Central America, tsunami waves of up to a foot were possible along the Pacific Coast, according to the PTWC.

       The PTWC said that those in threatened coastal areas should stay alert for information, and follow instructions from national and local authorities.

       Guatemala's national disaster agency issued a tsunami alert for its southern Pacific coast forecasting the arrival of waves up to a meter high. It advised people to move away from the sea.

       A policeman removes rubble from a building damaged by an earthquake in Oaxaca, Mexico, Tuesday, June 23, 2020. (AP Photo/Luis Alberto Cruz Hernandez)

       Officials said that while a tsunami threat exists for parts of the Pacific located closer to the epicenter, there is no threat for Hawaii or the U.S. West Coast.

       Mexico President Andrés Manuel López Obrador said one person was killed and another injured in a building collapse in Huatulco, Oaxaca. Otherwise he said reports were of minor damage such as broken windows and collapsed walls.

       Security tape alert people of a building damaged by an earthquake in Oaxaca, Mexico,Tuesday, June 23, 2020. (AP Photo/Luis Alberto Cruz Hernandez)

       Ports, airports and refineries were not damaged, he said in a video-recorded phone conversation with his civil defense chief. There had been more than 140 aftershocks, most of them small.

       The Mexican Red Cross told Fox News in a statement that volunteers from the organization are continuing to make tours in ambulances to identify possible victims.

       "Some roads are blocked due to landslides in the Oaxaca-Istmo highway section," the group said.

       Images posted to social media showed damage to some buildings in the Oaxaca state.

       In Huatulco, a laid-back beach destination known for surfing and small protected coves, the earthquake knocked goods off shelves and some rubble from buildings.

       Mari González of the Princess Mayev hotel in Huatulco told the Associated Press that staff and guests were able to evacuate the building before the quake, but that 45 minutes after the initial quake they were still outside because of strong aftershocks.

       “It was strong, very strong,” she said.

       González said there was some visible broken glass and mirrors, but no major damage.

       Local news media reported damage to some buildings in the state capital, Oaxaca City. State officials said they were assessing any damage.

       Video posted to Twitter also showed a sidewalk moving as the earthquake hit the area.

       The quake along the coast was felt in central and southern Mexico, swaying buildings in Mexico City and sending thousands into the streets.

       Juarez public hospital health workers wait on a street after a 7.4 earthquake sent them out from their work areas, in Mexico City, Tuesday, June 23, 2020. (AP Photo/Eduardo Verdugo)

       Seismic alarms sounded midmorning with enough warning for residents to exit buildings, according to the Associated Press.

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       Helicopters flew over downtown Mexico City and police patrols sounded their sirens.

       Security tape alert people of a building damaged by an earthquake in Oaxaca, Mexico, Tuesday, June 23, 2020. (AP Photo/Luis Alberto Cruz Hernandez)

       Groups of people still milled around in close proximity on streets and sidewalks in some neighborhoods of the capital about an hour after the quake. Many were not wearing masks despite past appeals from municipal officials for them to do so as a way to curb the spread of the new coronavirus.

       Video taken nearly 300 miles from the epicenter showed the quake strong enough to create waves in a pool.

       The USGS estimated that some 2 million people felt strong or moderate shaking and another 49 million felt weak or light shaking.

       Mexico's Pacific coast is located along the volatile "Ring of Fire,” a horseshoe-shaped series of fault lines around the ocean.

       Volcanoes, earthquakes, tsunamis: The ‘Ring of Fire’ explained

       The region has most of Earth's subduction zones, where oceanic plates slide under the lighter continental plates.

       Earthquakes tend to happen when those plates scrape or subside underneath each other. When that happens at sea, it can spawn tsunamis.

       In the past 35 years, there have been at least seven magnitude 7 or greater earthquakes, killing around 10,000 people — most of them in a 1985 8.0 quake.

       Fox News' Vicki Choi and the Associated Press contributed to this report.