Another earthquake in Panama after 7.6 magnitude quake that collapsed buildings

A powerful earthquake struck Panama’s southern coast, with the USGS revising its magnitude from 8.0 to 7.6. It was about 10 kilometres deep and centered roughly 200 kilometres southwest of Panama City. A later magnitude 6.0 earthquake struck 7 kilometres north of La Tronosa.

The main quake shook Panama City, Penonomé and several provinces, including Veraguas, Herrera and Los Santos. People evacuated buildings, offices, malls and homes. Vehicles and trees swayed in Penonomé, while residents in Costa Rica also felt the tremor.

Damage included a collapsed cathedral bell tower in Penonomé, building damage and road cracks in Veraguas. The later quake followed more than 40 aftershocks, keeping communities alert. Schools closed, metro lines were suspended, and precautionary evacuations affected coastal and urban areas while inspections continued.

An aftershock is an earthquake that follows a larger mainshock in the same general area. It happens as the crust adjusts after the main rupture changes stresses on nearby faults. Aftershocks are usually smaller, but “smaller” does not mean harmless.

Panama recorded more than 40 aftershocks after the main earthquake. Reported examples included magnitudes 5.8, 5.5 and 5.2. A separate magnitude 6.0 quake also struck 7 kilometres north of La Tronosa. These tremors can shake damaged structures again and dislodge unstable walls, roofs or debris.

That risk explains warnings from the US Embassy to stay away from damaged buildings and follow official guidance. People remained outdoors in Panama City because they feared further shaking. Continued inspections, evacuations and emergency checks mattered even though no deaths had been documented Friday evening.

Magnitude measures an earthquake’s size, not simply how long or widely it is felt. The USGS first estimated Panama’s main earthquake at 8.0, then revised it to 7.6. Other reports gave 7.7. Reported aftershocks ranged from magnitude 5.2 to 5.8.

The scale is logarithmic. A one-point increase means about ten times greater wave amplitude and roughly 32 times more energy released. Therefore, a 7.6 earthquake has much larger physical strength than a 5.2, 5.5 or 5.8 quake, even though all can cause dangerous local shaking.

The difference also helps explain the main quake’s broad effects. It sent people fleeing buildings, damaged provinces and prompted tsunami alerts. The smaller aftershocks still mattered because repeated movement could worsen damage, injure people near unstable structures and complicate rescue and inspection work.

The earthquake caused damage across Veraguas, Herrera and Los Santos, despite no widespread destruction being reported immediately. In Penonomé, a cathedral bell tower collapsed, other buildings were damaged, and one person was injured by debris. Cracks appeared along roads in Veraguas.

The shaking also disrupted daily life. Residents fled malls, offices and commercial buildings, while schools closed and two Panama City metro lines were suspended for safety checks. Electricity provider Naturgy reported outages across six provinces. Tocumen International Airport temporarily suspended operations before reopening.

These effects show why earthquake consequences extend beyond collapsed structures. Falling objects can injure people, damaged roads can hinder travel, and power failures can affect services. Officials continued inspections because aftershocks could worsen existing damage. The Panama Canal remained operational while teams checked its facilities for possible problems.

Tsunami alerts are issued when a strong earthquake may disturb the seabed or create dangerous coastal water movement. Panama’s earthquake prompted warnings for coastal areas across Central and South America. The US Embassy cautioned that unusual currents, unpredictable surges and damaging aftershocks could follow.

The initial potential threat included Panama, Costa Rica, El Salvador, Peru, Mexico, Guatemala, Nicaragua, Colombia and Ecuador. Nestor Luque of the University of Panama said waves of one to three metres were expected near Isla Canas and Los Santos. Seawater reportedly reached homes on Isla Canas.

The warnings for Panama, Colombia, Ecuador, Nicaragua and Guatemala were later lifted. Alerts for El Salvador and Chile’s Easter Island were also lifted, indicating that the assessed threat had declined. Officials still advised coastal residents to follow guidance, avoid damaged structures and stay away from strong currents.

Panama’s response focused on moving people away from danger and checking essential systems. Residents evacuated buildings and gathered outdoors. Schools closed, and two Panama City metro lines stopped for safety checks. Civil protection teams reported injuries and damage, while President Raul Mulino visited Penonomé.

Tocumen International Airport temporarily suspended operations, then reopened Friday afternoon. The Panama Canal Authority said canal operations continued normally while teams inspected facilities. Electricity provider Naturgy reported outages in six provinces. Authorities also monitored aftershocks and warned people to avoid damaged structures.

The country was already scheduled to hold a nationwide evacuation drill the following Monday. The exercise was intended to test emergency preparedness. Together, the immediate response and planned drill showed the importance of evacuation routes, transport checks, infrastructure inspections and public warnings after strong shaking.

Earthquakes happen when stress built up in Earth’s crust is suddenly released as rocks slip along a fault. Panama sits in a complex tectonic region involving the Caribbean, Cocos, Nazca and South American plates, along with smaller crustal blocks. Their movement can compress, pull apart or slide past nearby faults.

As plates and crustal blocks move, friction can lock a fault temporarily. Stress then accumulates until the rocks rupture or shift. That sudden movement sends seismic waves through the ground, producing the shaking felt in Panama City, Penonomé and other areas. Aftershocks occur as surrounding faults adjust.

The article does not name the fault or plate boundary responsible for this particular earthquake. It does report a shallow depth of about 10 kilometres and extensive shaking. Those details help explain the strong surface effects, but the event’s precise geological cause would require a specialized seismic analysis.