The exercise was initiated with a first dummy message issued by the Pacific Tsunami Warning Center (PTWC) and the West Coast and Alaska Tsunami Warning Center (WC/ATWC), at 13:02 UTC (9:02 AST) and disseminated over its standard broadcast channels to all its stakeholders and focal points. The message was issued according to schedule to the official Tsunami Warning Focal Points, and none of the institutions have reported issues with the reception of the message from the Tsunami Warning Center.
The Puerto Rico Seismic Network and other national and regional organizations also issued messages for its areas of responsibility. Sirens, emails, emergency alert systems, text messages, media outlets, NOAA weather radio, and social media were used by many focal points to further disseminate the messages. In addition to the communication tests, exercises were conducted at various additional levels of magnitudes and sophistication and included seminars, table top exercises, video/web conferencing and drills.
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