Seismic tremor triggers reef stress alerts across Costa Mar

The Monte Verde Reef Station reported a sea‑surface temperature of 30.1 °C on Monday, 1.3 °C above the seasonal average, and a sudden rise in nitrate levels that coincided with the 07:42 UTC tremor that registered magnitude 7.2 on the regional seismic network.

The epicentre lay 45 km southwest of Puerto Azul, in the sub‑tectonic trench that separates the Caribbean plate from the continental shelf. The quake generated a 20‑centimetre sea‑level oscillation that briefly lifted the mangrove fringe at Laguna Verde, prompting the Costa Mar Reef Monitoring Network to flag a potential bleaching event.

Federal authorities in Meridian activated the Emergency Marine Response Unit, while the Marine Ministry in Puerto Azul ordered a temporary suspension of dive‑operator licences in the most affected zones. Tourist arrivals for the week dropped by 12 % according to the latest figures from the Ministry of Tourism, and several small‑boat captains reported increased fuel consumption as engines worked harder against the unsettled waters.

The full impact on coral health, fisheries yields and the upcoming eco‑tourism season will be detailed in the next briefing, which will include data from the Federal Hydro Authority on reservoir releases that may moderate water temperature in the near term.