SONÁ DISTRICT — A 6.1 magnitude quake shook near Río Grande on Monday afternoon, according to the U.S. Geological Survey.

The USGS reported a tremor in the region at 23:20 UTC (18:20 local time). The epicenter was about 17 km west of Río Grande, at a depth of 11 km.

Did you feel it?

If you experienced the earthquake, you can submit a report via the USGS Felt Report form. So far, the agency has collected 52 online responses from people indicating they felt light shaking. According to the USGS DYFI report, residents in cities including San Miguelito, El Coco, Almirante and Los Algarrobos reported experiencing the quake.

Impact and estimated losses

The USGS categorized this as a Green Alert, which means there is a low likelihood of casualties and damage. Recent earthquakes in this area have caused secondary hazards such as landslides and liquefaction that might have contributed to losses.

Structure information summary

Overall, the population in this region resides in structures that are a mix of vulnerable and earthquake resistant construction. The predominant vulnerable building types are mud wall and adobe block construction.

Tremors past week

31 quakes of magnitude 2.5 or higher have been recorded in the area over the last week. The strongest, a 6.6 magnitude quake, was reported in the same region on Oct. 9.

The top five nearby earthquakes in the last week:

• 6.6, west of Río Grande on Oct. 9
• 5.2, southeast of Río Grande on Oct. 9
• 5.0, west of Río Grande on Oct. 9
• 5.0, southeast of Río Grande on Oct. 9
• 5.0, south of Leones Arriba on Oct. 9

Area struck by 7.6 quake in 1991
Strong earthquakes have struck the area before. A magnitude 7.6 tremor struck 21.1 miles south of Limón in Limón on Apr. 22, 1991, at a depth of 6.2 miles.

Source: The U.S. Geological Survey