Update: Seismic activity on June 18 – 5.5 magnitude earthquake close to central Mid-Atlantic Ridge registered

Published Jul 16, 2026

A 5.5 magnitude quake occurred near central Mid-Atlantic Ridge on Thursday morning, according to the U.S. Geological Survey.

A tremor hit the area at 03:43 UTC (02:43 local time). The earthquake’s epicenter was of central Mid-Atlantic Ridge and occurred at a depth of 10 km. The magnitude was originally reported as 5.4 but later upgraded to 5.5.

Did you feel it?

You can let the USGS know if you noticed the quake by filling out their Felt Report form.

Impact and estimated losses

The USGS categorized this as a Green Alert, which means there is a low likelihood of casualties and damage.

Structure information summary

There are likely to be no affected structures in this region.

Last week’s tremor

There was one more quake of magnitude 6.1 centered nearby, which was also reported near central Mid-Atlantic Ridge on Jun. 17.

Source: The U.S. Geological Survey