M 6.0 sea quake 256 km off the coast of Oregon

M 6.0 sea quake 256 km off the coast of Oregon

USGS reported magnitude 6.0 quake at 3:31 UTC (Feb. 15, 2012) 256 km (159 miles) west of the coast of Oregon. Recorded depth by both USGS and EMSC was 10 km. No tsunami warning was issued, and no damage reported. This earthquake is not unusual as it occurred in a

Deep-sea volcanoes could also explode

Deep-sea volcanoes could also explode

Between 75 and 80% of all volcanic activity on Earth takes place at deep-sea, mid-ocean ridges. Most of these volcanoes produce effusive lava flows rather than explosive eruptions, both because the levels of magmatic gas (which fuel the explosions and are made up of…