We explore the vulnerabilities in the Indian Ocean’s current tsunami alert network two decades after 2004. Despite technical advances, key warning buoys are decommissioned and coastal planning remains inadequate.

Eerrie sirens rang out across parts of central Alaska Wednesday afternoon after a catastrophic 7.3-magnitude earthquake triggered a series of tsunami warnings. A potent 7.2 magnitude earthquake, which was later upgraded to 7.3, hit 50 miles south of Sand ...