Electronic Supplement to
The 1904 M_s 7.3 Earthquake in Central Alaska

by Carl Tape, Anthony Lomax, Vipul Silwal, James D. Agnew, and Brian Brettschneider

Table S3. Summary of Arrival Times for the Two Closest Stations—Sitka, Alaska, and Victoria, British Columbia—to the 1904 Alaska Earthquake

Reference	Station		P.T. Commence (hh:mm:ss)	L.W. Commence (hh:mm:ss)	Max. (hh:mm:ss)	End (hh:mm:ss)	Max. Amp. (mm)	Remarks
Hazard (1910)	Sitka	N	22:01:07	22:03:43	22:05:07	24:07	55.0
Reid (1905)	Sitka	N	22:01.1	22:03.7	22:05.1	24:07.0	55.0
Hazard (1910)	Sitka	E	22:00:50	22:03:26	22:05:26	23:51	52.0	Both pointers went off the paper at 22 hr 05 min
Reid (1905)	Sitka	E	22:00.8	22:03.4	22:05.4	23:51.0	52.0	Typical, large
Rosenthal (1907)	Sitka		22:00.8	22:03.4	22:05.1–22:05.4	24:06.8
Denison (1904)	Victoria		22:02	—	22:09	24:46	17.5
Reid (1905)	Victoria	E	22:00.7	22:05.0	22:08.9	24:44.5?	18.0+	Off paper over 2 min
Judd and Milne (1905)	Victoria		No. P.T.	22:00.7	22:08.9	24:44.5	18.0+	Very large. Off paper over 2 min
Rosenthal (1907)	Victoria		22:00.7	22:05.0	22:08.9	22:44.7

The headers are the same as those in the Shide registers and stand for “preliminary tremors” (P.T.) and “large waves” (L.W.). Eight hours have been added to the times listed in Denison (1904) to correct to UTC time. The end times from Rosenthal (1907) are calculated from adding the duration (“Dauer”) to the start time (“V₁”); his duration of 44 min for Victoria is presumably a typo, because it was 164 min (Denison, 1904; Reid, 1905).

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