A series of powerful quakes rocked Russia (M7.7, M6.2) and Peru (M6.4).
It all started on July 17, 2017 as a M6.2 earthquake hit 183km ESE of Nikol’skoye, Russia at 11:05 am (UTC). This earthquake marked the beginning of an earthquake swarm comprising at least 15 quakes bewteen M4.4 and M7.7 in the region.
Then, a bit more than 12 hours later, 11:30 pm, a M7.7 earthquake hit the same area of Russia – 198km ESE of Nikol’skoye, Russia. The earthquake was very shallow – only 10 km below the seabed. The US Pacific Tsunami Warning Centre initially warned hazardous tsunami waves were possible for coasts within 300 km of epicentre. The tsunami threat had now passed.
Finally, two hours later, a M6.4 earthquake hit 98km WNW of Camana, Peru.
The strong and shallow earthquake hit near the coast of Arequipa, Peru at 02:05 UTC on July 18, 2017. The agency is reporting a depth of 44.1 km (27.4 miles). This quake occurred about 2 hours later the major M7.7 earthquake near Kamchatka (Aleutian Trench). No tsunami warning.