<p>A M7.8 earthquake occurred northeast of Culverden at 00:02 NZDT on Monday 14 November 2016. Strong to severe shaking was felt throughout New Zealand. Following the earthquake, tsunami waves were detected on the New Zealand Tsunami Gauge Network. MCDEM issued tsunami warning messages via the National Warning System from 01:00 until 15:00 NZDT on 14 November 2016, at which time the warning was cancelled. </p>