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Sunday, February 28, 2010

Tsunami: Auckland time-lapse pictures [UPDATE]


The transit cameras on the Auckland motorway system are a good a measure as any since they cover the shallow parts of the inter-tidal area; but as with the Samoa tsunami this time the Chilean tsunami proved just as anti-climactical. It is difficult to detect the movements from these images, the tsunami surge would probably have been noticeable in the channels further up the harbour - such as Riverhead, the entrance to the West Harbour marina etc. where I imagine they may have replicated the dramatic draining and then flooding/surging that has been observed at the Tutukaka marina in Northland.

The two transit cameras used for this study: the Pt Chev/Waterview interchange looking west across the causeway (left), and the Esmonde/Akoranga interchange looking south across the inner harbour to the city (right). The images in the map are at the end of the sequence (+2 hours from the official 10:52am impact time). The tide was going out during this whole period so we should be looking for any increase that re-covers any of the foreshore.

Stand-by for sequence.[UPDATE: Initial sequencing complete.

(Click on images to enlarge).

@ +1 hour to +2 hours: 11:55AM - 12:55PM NZDT at 5 min intervals.
Pt Chev/Waterview looking west to Rosebank

Takapuna/Barry's Pt. looking south to City

@ 11:45-12:02 using one minute intervals the tide does seem to recede 11:48-11:52 and then return at 11:53 - hard to say though with the low quality images and the light (although there weren't many clouds around at the time).
@ 11:51-54 close up. Out.In.

More sequences to follow.

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