. Collected reprints, Essa Institute for Oceanography. Oceanography Figure 9.—Normal tide records showing wind waves. Tide records for the three stations show varying amounts of pencil motion caused by differences in gage exposures and in size of intake openings in stilling wells. Stations A, B, and C might have received the following message from Hono- lulu Observatory: TSUNAMI. EARTHQUAKE OCCURRED Z. LAT LONG OB- SERVE TIDE RECORD 1600Z TO 1800Z. REPORT ANY UNUSUAL ACTIVITY IMMEDIATELY OR REPLY NEGATIVE AT 1800Z. ACKNOVVLEDGE RECEIPT OF THIS MESSAGE IMMEDIATELY. Each station, a
. Collected reprints, Essa Institute for Oceanography. Oceanography Figure 9.—Normal tide records showing wind waves. Tide records for the three stations show varying amounts of pencil motion caused by differences in gage exposures and in size of intake openings in stilling wells. Stations A, B, and C might have received the following message from Hono- lulu Observatory: TSUNAMI. EARTHQUAKE OCCURRED Z. LAT LONG OB- SERVE TIDE RECORD 1600Z TO 1800Z. REPORT ANY UNUSUAL ACTIVITY IMMEDIATELY OR REPLY NEGATIVE AT 1800Z. ACKNOVVLEDGE RECEIPT OF THIS MESSAGE IMMEDIATELY. Each station, after acknowledging the message immediately, might reply as fol- lows at 1800Z: TSUNAMI. NO UNUSUAL ACTIVITY BETWEEN 1600Z AND Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Institute for Oceanography; Atlantic Oceanographic Laboratories (U. S. ); Pacific Oceanographic Laboratories; United States. Environmental Science Services Administration. Research Laboratories. Washington, D. C. : U. S. Dept. of Commerce, Environmental Science Services Administration, Research Laboratories : For sale by the Supt. of Docs. , U. S. G. P. O.
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