At the time of the 2004 tsunami, the tsunami warning
system existed only in the Pacific Ocean. The Pacific
Tsunami Warning Center (PTWC), located in Hawaii,
issued the first information bulletin only 15 minutes
after the earthquake. The earthquake was located off the
west coast of Northern Sumatra, and the magnitude was
initially estimated to be 8.0. The second bulletin was
issued at 69 minutes after the earthquake, but still before
the tsunami arrivals at the coasts of Thailand, Sri Lanka
and India. The earthquake size was updated to 8.5 and
the possibility of a local tsunami was included in the
bulletin. However, these messages did not reach the
governments or coastal communities around the Indian
Ocean.
At the time of the 2004 tsunami, the tsunami warningsystem existed only in the Pacific Ocean. The PacificTsunami Warning Center (PTWC), located in Hawaii,issued the first information bulletin only 15 minutesafter the earthquake. The earthquake was located off thewest coast of Northern Sumatra, and the magnitude wasinitially estimated to be 8.0. The second bulletin wasissued at 69 minutes after the earthquake, but still beforethe tsunami arrivals at the coasts of Thailand, Sri Lankaand India. The earthquake size was updated to 8.5 andthe possibility of a local tsunami was included in thebulletin. However, these messages did not reach thegovernments or coastal communities around the IndianOcean.
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