Questions remain about the widespread tsunami warning following yesterday's large earthquake off the Northern California coast. Millions received the alert on their phones and it caused quite a bit of confusion and concern. We hear from the coordinator at the national tsunami warning center in Alaska who explains why they're taking a closer look at how to improve the alert system.

Subscribe to KTVU's YouTube channel:
   / @ktvufox2  

KTVU delivers the best indepth reports, interviews and breaking news coverage in the San Francisco Bay Area and California

Watch KTVU's newscasts on https://www.ktvu.com/live

Download KTVU's news and weather apps for free at https://www.ktvu.com/mobileapps

Subscribe to KTVU's newsletter at https://www.ktvu.com/newsletters

Follow KTVU on Facebook:   / ktvu  

Follow KTVU on Twitter:   / ktvu  

Follow KTVU on Instagram:   / ktvu2