Chile earthquake and tsunami: Hawaii on tsunami alert after 8.3 quake strikes Chile.

Small Tsunami Reaches Hawaii and California, Widespread Damage Reported in Chile

Small Tsunami Reaches Hawaii and California, Widespread Damage Reported in Chile

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Sept. 16 2015 9:51 PM

Small Tsunami Reaches Hawaii and California, Widespread Damage Reported in Chile

Damage in Concon, Chile following Wednesday's huge earthquake and tsunami.

Photo by Claudio Reyes/AFP/Getty Images

Update, Sept. 17: Tide gauge data now shows the tsunami has reached Hawaii, with waves measuring 2 to 4 feet above normal tide level. That’s probably not enough to inflict any damage, but Hawaii has closed beaches and urged people to stay out of the water all day as a precaution.

Meanwhile, smaller waves have also reached southern California, mostly creating especially strong coastal currents but with no reports of damage.


In Chile, daylight has revealed widespread damage from the 15-foot tsunami.

A witness in Chile told the Guardian that the waves destroyed coastal houses and that there was “sheer terror and anguish” in the immediate minutes following the earthquake as survivors fled uphill to safety. Media reports indicate that at least 10 people have died in Chile and more than a million people have evacuated.

Original post:

A powerful, tsunami-generating 8.3-magnitude earthquake struck just offshore the coast of central Chile on Wednesday evening, at about 7:54 p.m. local time. It is the strongest earthquake in Chile since a catastrophic 8.8 in 2010.


Coastal buoys detected a 10-to-15-foot high tsunami that reached the Chilean coast within minutes. There were no immediate reports of damages or injuries, although a United States Geological Survey predictive algorithm estimated dozens of fatalities could occur, with economic losses of hundreds of millions of dollars.

Photos posted on social media and footage from state-owned TVN appeared to show the tsunami waves reaching the coast. (You can watch TVN’s live stream here.)

In the coastal city of Valparaiso, tsunami warning sirens blared as people scrambled to evacuate low-lying areas. Significant tsunami waves continued to reach the coast for at least 90 minutes after the initial wave struck.

The USGS has also issued a Pacific-wide tsunami threat message and a tsunami advisory for Hawaii; an advisory is the second-lowest on a four-tiered warning scale. According to the latest forecast, the tsunami wave will likely be 1 to 3 feet high when it reaches Hawaii about 3 a.m. local time on Thursday. A similarly sized wave may also affect Mexico, Japan, New Zealand, and many small Pacific Islands. 

According to the USGS, this was a megathrust earthquake—which are typically responsible for the most violent quakes and tsunamis on Earth. Wednesday night’s earthquake sloshed water in a swimming pool in Argentina and set off seismographs worldwide, including one in Washington state.

Eric Holthaus is a meteorologist and a columnist for Grist.