The earthquake agency color-coded the locations to reflect the depth. Yellow dots represent quakes that were from 0 to 30 kilometers deep. That is about 18.5 miles. Red dots represent quakes that had their epicenter much deeper, perhaps as much as 116 kilometers (72 miles) as in the case of one that took place 21 kilometers (13 miles) north of Puerto Viejo de Sararpiquí.
Quakes with less depth took place all over the country, noted the Red, which is affiliated with the Universidad de Costa Rica. However, there were clusters at the Gulf of Papagayo, in the Nicoya peninsula, southwest of San José, including the Pacific beach areas of Dominical and Quepos.
There were deeper quakes around the peninsula of Santa Elena in the northwest, between the Gulf of Nicoya and Lake Arenal and along the Pacific coast.