The Panama Earthquake, Explained: What Shook the Canal Country

Panama just lived through one of the strongest earthquakes in its recorded history. On Friday afternoon, October 9, a magnitude 7.7 tremor struck the country's Azuero Peninsula, shaking buildings in Panama City about two hundred kilometers away and rattling windows as far as neighboring Colombia and Costa Rica. The U.S. Geological Survey first measured the Panama earthquake at magnitude eight, then revised the figure to seven point six, and settled on seven point seven. A magnitude 6.6 aftershock followed later in the afternoon, and seismologists have since recorded more than eighty aftershocks, according to Wikipedia's page on the event.

The shaking was at its most violent near the Panama earthquake's epicenter, which the USGS placed about ten kilometers southwest of the remote farming community of Pitaloza Arriba, in Herrera province. The break happened at a shallow depth of roughly thirteen kilometers, and shallow quakes punch harder at the surface: the shaking reached intensity level nine, rated "violent," on the modified Mercalli scale. Churches and homes collapsed across Herrera, Cocle, Veraguas and Los Santos provinces. In Penonome, a cathedral bell tower came down; in Los Santos, the historic Church of San Atanasio collapsed; and deep fissures sliced through roads across the region, according to the Associated Press.

Despite the destruction, President Jose Raul Mulino said Friday evening that authorities had not documented a single death, though he warned the count could change as crews reach remote villages. "Nobody was ready, and no one is ever ready for this type of disaster," Mulino said after urging calm earlier in the day, the AP reported. At least twenty-seven people were injured. Naturgy, the country's main power provider, reported outages in six provinces. Tocumen International Airport briefly suspended flights before resuming service, and the Panama Canal kept operating while technical teams inspected its facilities for damage, according to the AP.

The Panama earthquake also set off a tsunami scare along the Pacific. The U.S. Tsunami Warning System flagged a possible tsunami for much of Central America's coastline, and Panama ordered shoreline evacuations. Nestor Luque, director of the Geosciences Institute at the University of Panama, said waves three to ten feet tall were possible around Isla Canas and the southern coast of Los Santos, though he expected nothing bigger further out. Seawater did wash into coastal homes on Isla Canas. The warnings for Panama, Colombia, Ecuador, Nicaragua and Guatemala were later lifted, and so were alerts from El Salvador and Chile's Easter Island, the Associated Press reported.

How the Panama earthquake unfolded

The timeline compressed a lot of violence into a few hours. The main shock hit around one in the afternoon local time, emptying offices and schools across Panama City, where workers poured into the streets and the Metro halted service, according to Reuters. Classes were suspended nationwide. The second big tremor and the swarm of aftershocks kept nerves raw into the evening, with the University of Panama's seismologists logging dozens of follow-on quakes, many too weak to feel.

Mulino traveled to Penonome, the city closest to the damage zone, to coordinate the response. U.S. Secretary of State Marco Rubio said on X that Washington was rapidly mobilizing resources and personnel at Panama's request. "The United States stands with the people of Panama," Rubio wrote, according to the AP. Mulino said he had also spoken with the presidents of Chile, Uruguay and Guatemala, who offered regional support.

Why the Panama earthquake hit so hard

The fault that slipped is the Azuero-Sona fault, a left-lateral strike-slip structure running across the Azuero Peninsula. Luque, the Panamanian geosciences chief, said the fault had stored up pressure that periodically released, and that seismic signals from the break traveled across the entire country, which is why the shaking felt so widespread. Wikipedia notes that the Azuero-Sona fault branches off the South Panama Deformation Belt, where the small Panama tectonic plate grinds against its neighbors at twenty to twenty-five millimeters a year.

Panama sits in one of the busiest seismic neighborhoods on Earth. To the west, the Cocos plate dives beneath the Caribbean plate; to the south, the Nazca plate does the same, and Panama is caught between them on the Pacific Ring of Fire, the arc around the ocean basin where most of the world's earthquakes happen, according to the AP. Kilauea, a volcano sitting on the same Ring of Fire, has been acting up lately too. The last quake to cause widespread damage in Panama came in 1991, when a magnitude 7.4 shock near the Costa Rican border killed twenty-three people and injured hundreds in Bocas del Toro.

What makes the Panama earthquake notable to scientists is that it may be the largest earthquake ever recorded on land in Panama. A seismology newsletter, Earthquake Insights, compared it to California's 2019 Ridgecrest quake: a "quiet fault" that produced little seismic noise before rupturing big. The USGS estimates that roughly forty-three thousand people live in areas that experienced at least severe shaking, and puts potential economic losses between one and ten percent of Panama's gross domestic product.

What the Panama earthquake leaves behind

Aftershocks from the Panama earthquake will keep rattling the country for days or weeks. That is normal after a quake this size: stress redistributes along the fault, and smaller breaks keep firing as it settles. Panama has a national earthquake evacuation drill scheduled for Monday, according to Reuters, and Friday's orderly response will get its first real test there. Emergency crews will spend the weekend reaching damaged towns while inspectors work through collapsed churches, cracked roads and darkened neighborhoods.

One caution for anyone following along online: big disasters always pull fake and recycled video onto social feeds, so check footage against named outlets before sharing it. Crises are prime time for misleading clips, as a GenZNewZ report on fake war footage showed. For now, the toll stands at zero confirmed deaths and twenty-seven injured, numbers Mulino said could still change as the search continues.