Plot of Sumatra tsunami records at 6 stations in British Columbia
Two other stations: Prince Rupert and Queen Charlotte City are empty:
- Prince Rupert has a bad admittance characteristic suppressing all high frequency oscillations
with periods less than 2 hours (see Figure 7 in Rabinovich and Thomson, 2004).
- QCC is sheltered from the open ocean.
We are still waiting for information form Langara, located near to the northern end of the Queen Charlotte Islands.
Information from this station is normally, very noisy.
Estimated parameters of the recorded waves:
Wave height, duration, periods:
Tsunami arrival times (TAT) are not clear
(1) The actual arrival time was much later (10-12 hours) than it was predicted. (see PTWC and WC/ATWC estimates)
(2) Apparently different trains of tsunami waves were arriving to the observational sites
by different ways, probably after multiple reflection.
Quite long ringing of tsunami oscillations in Winter Harbour, Tofino, Bella Bella, and Victoria
also indicates that there were several sources of incoming waves.
Alexander B. Rabinovich, D.Sc.
Institute of Ocean Sciences
9860 West Saanich Rd.
Sidney, BC, V8L 4B2 Canada