No tsunami warning was issued for Hawaii. State Civil Defense first released a tsunami watch, which has been canceled a few hours later. I am part of a group of volunteers serving State Civil Defense as tsunami observers. The goal is to gather runup and inundation data immediately after a tsunami has struck. Those data are crucial for tsunami research such as the validation of numerical models. Together with Volker Roeber I am responsible for the observation of the coastal segment of Kahala. State Civil Defense provides us with survey equipment such as GPS, level rods, compass, etc. (see photos). Though no destructive tsunami was expected we went down to Kahala beach in order to test whether we were able to observe tsunami waves using the Civil Defense Tsunami survey equipment for water level readings at the waterline instead of runup heights on land. Volker was archiving the data, while I had to read the relative sea surface height (ssh) from the instrument in 15-30 seconds increments. This was especially challenging because the projected arrival time of the tsunami coincided with high tide and heavy winds. The resulting choppy conditions made it difficult to read the ssh from our measuring rod and added some noise to our data.
Nonetheless there appears some longer period signals (~4 and 15 minutes) in the data (compare timeseries). I have not checked whether this signals are significant and might correspond to the tsunami or some local edge waves the tsunami could have been triggered.
(click images for full size)