Seismic activity continues to shake Puerto Rico with 5.2 quake

Friday, January 17, 2020

On Wednesday morning, a magnitude 5.2 earthquake hit the already rattled United States commonwealth of Puerto Rico. Puerto Rico has experienced dozens of earthquakes over magnitude 4.5 since late December, including a 6.4 quake that hit on January 7 and caused an island-wide blackout.

The United States Geological Survey (USGS) placed the epicenter of the quake about eight kilometers (five miles) southwest of the town of Guenica.

One resident told Paul Rivera of WESH 2 news, "We're used to it." Seismologists have buried sensors in the ground in an attempt to find the cause of the past month's unusual seismic activity.

John Geiger of USGS told the press last week, "The past several weeks we've had hundreds of small earthquakes in the same region [...] It began on Dec. 28, when we had a 4.7-magnitude [earthquake] there. Since the 4.7, we've had over 400 magnitude 2+ earthquakes."

Last week, continuing aftershocks hampered repair efforts, and roughly two thirds of the island was still without power two days after the January 7 quake. That event destroyed at least 300 homes, ripped up roads, killed one and injured eight people, and cracked the island's biggest power plant. The governor of Puerto Rico, Wanda Vázquez Garced, declared a state of emergency.

This followed a 5.8 magnitude earthquake the previous day that collapsed the famous Punta Ventana rock formation.

José Ortiz of the island's power authority said fixing the island's largest power plant, which was damaged by the quake, may take a year. The Costa Sur power plant at Guayanilla was close to the January 7 quake's epicenter. Costa Sur provided power for about a quarter of Puerto Rico's private homes and businesses. Reportedly, without Costa Sur the island's other plants would have to operate near full capacity to keep the residents in power.

Puerto Rico had still not fully recovered from 2017's Hurricane Maria, estimated to have done about $90 billion in property damage and claimed about 3000 lives.

In predictions since the January 7 quake, the U.S. Geological Survey has said the earthquakes may continue into early February.

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Sources

"Magnitude 5.2 earthquake rattles Puerto Rico" — WESH, January 15, 2020
"M 5.2 - 8km SW of Guanica, Puerto Rico" — United States Geological Survey, January 15, 2020
"Magnitude 6.4 Earthquake in Puerto Rico" — U.S. Geological Survey, January 15, 2020 (most recent update)
"Puerto Rico earthquake: Two-thirds of island still without power" — BBC, January 9, 2020
Nicole Acevedo, Sam Brock and Erika Angulo. "Restoring an earthquake-hit power plant in Puerto Rico could take a year" — NBC News, January 9, 2020
Nicole Chavez, Camila Bernal, and Eliott C. McLaughlin. "Puerto Rico earthquake: Roughly two-thirds of island without power amid dozens of aftershocks" — CNN, January 8, 2020
Bill Chappell and Colin Dwyer. "Deadly 6.4 Magnitude Quake Rocks Residents Awake In Puerto Rico" — NPR, January 7, 2020
Aila Slisco. "Florida State Representative Says Trump Has 'Hatred' For Puerto Rico in Wake of 6.4 Magnitude Earthquake" — Newsweek, January 7, 2020

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