Magnitude 7.7 Quake Hits Indonesia; Tsunami Warning
Magnitude 7.7 Quake Hits Indonesia; Tsunami Warning
The News
A magnitude 7.7 earthquake struck off the coast of Indonesia on Friday and a tsunami warning was issued, according to the U.S. Geological Survey and the European-Mediterranean Seismological Centre.
A second, smaller quake hit the same region soon after — measured at magnitude 6.3 by the EMSC, and reported as 6.2 by The Sun.
There were no confirmed reports of deaths or damage in the first hours after the quake.
Timeline
the EMSC first put the offshore quake at magnitude 6.9, as reported by Reuters. The Sun reported the initial reading was even lower, at 6.9, before being revised upward.
the magnitude was raised to 7.7 by the USGS and the EMSC, and a tsunami warning was issued for the region.
Shortly after the main shock: a second quake struck the same area — magnitude 6.3 per the EMSC, 6.2 per The Sun.
Reactions
The warning came from the seismic agencies themselves rather than from political leaders: the USGS confirmed the 7.7 reading, and the EMSC logged both the main shock and the aftershock.
No Indonesian government casualty figures had been released as of publication.
What's Next
Magnitudes on a quake this size are routinely revised in the hours after it hits, as more seismic stations report in — the 6.9-to-7.7 revision already happened once here.
Watch for whether the tsunami warning is lifted or extended, and for the first official damage and casualty assessments from Indonesian authorities.
More
This is the second major quake in a week. NBC News noted that a magnitude 7.4 earthquake struck western Colombia on Monday, causing widespread damage.
Indonesia sits on the Pacific "Ring of Fire," which is why quakes there matter to the U.S. West Coast and Hawaii: big offshore ruptures in that zone are what Pacific tsunami warning systems are built to track.
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