HRV Seismogram Archival Project: Scanned Images (1939)

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Choose month or day of interest. Once the file of interest is found, please use the right button of your mouse to save the image to your computer.

JanuaryFebruaryMarch
1 2 3 4 5 6 7 1 2 3 4 1 2 3 4
8 9 10 11 12 13 14 5 6 7 8 9 10 11 5 6 7 8 9 10 11
15 16 17 18 19 20 21 12 13 14 15 16 17 18 12 13 14 15 16 17 18
22 23 24 25 26 27 28 19 20 21 22 23 24 25 19 20 21 22 23 24 25
29 30 31 26 27 28 26 27 28 29 30 31
AprilMayJune
1 1 2 3 4 5 6 1 2 3
2 3 4 5 6 7 8 7 8 9 10 11 12 13 4 5 6 7 8 9 10
9 10 11 12 13 14 15 14 15 16 17 18 19 20 11 12 13 14 15 16 17
16 17 18 19 20 21 22 21 22 23 24 25 26 28 18 19 20 21 22 23 24
23 24 25 26 27 28 29 28 29 30 31 25 26 27 28 29 30
30
JulyAugustSeptember
1 1 2 3 4 5 1 2
2 3 4 5 6 7 8 6 7 8 9 10 11 12 3 4 5 6 7 8 9
9 10 11 12 13 14 15 13 14 15 16 17 18 19 10 11 12 13 14 15 16
16 17 18 19 20 21 22 20 21 22 23 24 25 26 17 18 19 20 21 22 23
23 24 25 26 27 28 29 27 28 29 30 31 24 25 26 27 28 29 30
30 31
OctoberNovemberDecember
1 2 3 4 5 6 7 1 2 3 4 1 2
8 9 10 11 12 13 14 5 6 7 8 9 10 11 3 4 5 6 7 8 9
15 16 17 18 19 20 21 12 13 14 15 16 17 18 10 11 12 13 14 15 16
22 23 24 25 26 27 28 19 20 21 22 23 24 25 17 18 19 20 21 22 23
29 30 31 26 27 28 29 30 24 25 26 27 28 29 30
31

1938 Back to List of Years 1940

s1789_1939_0305_0306_sp_z_f0.jpg

January

Date Instrument Components Notes
01/04 - 01/05 SP Z (630 MB)     Info NS (460 MB)     Info EW (280 MB)     Info
01/09 - 01/10 SP Z (500 MB)     Info NS (370 MB)     Info EW (320 MB)     Info
01/17 - 01/18 SP Z (550 MB)     Info NS (510 MB)     Info EW (280 MB)     Infoe
SP* Z (1.07 GB)     Info NS (1.06 GB)     Info e
LP Z/EW (300 MB)     Info Z/EW (300 MB)     Infos
LP* Z/EW (1.06 GB)     Info Z/EW (1.06 GB)     Infos
01/17 - 01/19 LP NS (300 MB)     Info s
LP* NS (1.07 GB)     Info s
01/18 - 01/19 SP Z (470 MB)     Info NS (540 MB)     Info EW (380 MB)     Info
SP* Z (1.06 GB)     Info EW (1.07 GB)     Info
01/19 - 01/21 LP NS (660 MB)     Info es
LP* NS (1.06 GB)     Info es
01/20 - 01/21 SP Z (660 MB)     Info NS (670 MB)     Info EW (460 MB)     Infoe
SP* Z (1.06 GB)     Info NS (1.05 GB)     Info EW (1.05 GB)     Infoe
LP Z/EW (530 MB)     Info Z/EW (530 MB)     Infoe
LP* Z/EW (1.05 GB)     Info Z/EW (1.05 GB)     Infoe
01/21 - 01/22 SP Z (330 MB)     Info NS (370 MB)     Info EW (210 MB)     Info
SP* Z (1.07 GB)     Info EW (1.06 GB)     Info
LP Z/EW (250 MB)     Info Z/EW (250 MB)     Infoe
01/23 - 01/25 LP NS (310 MB)     Info es
LP* NS (1.07 GB)     Info es
01/24 - 01/25 SP Z (680 MB)     Info NS (510 MB)     Info EW (320 MB)     Infoe
SP* Z (1.06 GB)     Info NS (1.06 GB)     Info EW (1.07 GB)     Infoe
LP Z/EW (330 MB)     Info Z/EW (330 MB)     Infoe
LP* Z/EW (1.06 GB)     Info Z/EW (1.06 GB)     Infoe
01/27 - 01/28 SP Z (530 MB)     Info NS (270 MB)     Info EW (270 MB)     Infoe
SP* Z (1.05 GB)     Info NS (1.06 GB)     Info EW (1.06 GB)     Infoe
LP Z/EW (290 MB)     Info Z/EW (290 MB)     Infoes
LP* Z/EW (1.06 GB)     Info Z/EW (1.06 GB)     Infoes
01/27 - 01/29 LP NS (180 MB)     Info e
LP* NS (1.06 GB)     Info e
01/28 - 01/29 SP Z (430 MB)     Info NS (270 MB)     Info EW (230 MB)     Infoe
SP* Z (1.06 GB)     Info NS (1.05 GB)     Info EW (1.06 GB)     Infoe
LP Z/EW (240 MB)     Info Z/EW (240 MB)     Info
01/29 - 01/30 SP Z (570 MB)     Info NS (550 MB)     Info EW (230 MB)     Infoe
SP* Z (1.06 GB)     Info EW (1.05 GB)     Infoe
LP Z/EW (270 MB)     Info Z/EW (270 MB)     Infoe
LP* Z/EW (1.06 GB)     Info Z/EW (1.06 GB)     Infoe
01/29 - 01/31 LP NS (340 MB)     Info es
LP* NS (1.06 GB)     Info es
01/31 - 02/01 SP NS (650 MB)     Info s

February

Date Instrument Components Notes
01/31 - 02/01 SP NS (650 MB)     Info s
02/02 - 02/03 SP Z (670 MB)     Info NS (630 MB)     Info EW (300 MB)     Info
LP Z/EW (320 MB)     Info Z/EW (320 MB)     Infoe
02/02 - 02/04 LP NS (550 MB)     Info es
LP* NS (1.05 GB)     Info es
02/03 - 02/04 SP Z (670 MB)     Info NS (700 MB)     Info EW (520 MB)     Infos
SP* Z (1.07 GB)     Info EW (1.06 GB)     Infos
LP Z/EW (540 MB)     Info Z/EW (540 MB)     Infoes
02/08 - 02/09 LP Z/EW (530 MB)     Info Z/EW (530 MB)     Infoes
LP* Z/EW (1.07 GB)     Info Z/EW (1.07 GB)     Infoes
02/08 - 02/10 LP NS (640 MB)     Info es
LP* NS (1.05 GB)     Info es
02/09 - 02/10 SP Z (710 MB)     Info NS (620 MB)     Info EW (440 MB)     Info
SP* Z (1.05 GB)     Info
LP Z/EW (530 MB)     Info Z/EW (530 MB)     Infoe
LP* Z/EW (1.06 GB)     Info Z/EW (1.06 GB)     Infoe
02/12 - 02/13 SP Z (750 MB)     Info NS (760 MB)     Info EW (440 MB)     Info
02/12 - 02/14 LP NS (520 MB)     Info
02/24 - 02/25 SP Z (400 MB)     Info NS (360 MB)     Info EW (230 MB)     Infoe
SP* Z (1.07 GB)     Info EW (1.06 GB)     Infoe
LP Z/EW (260 MB)     Info Z/EW (260 MB)     Infoe
02/24 - 02/26 LP NS (190 MB)     Info
"drum motor gears worn"
LP* NS (1.06 GB)     Info
02/26 - 02/27 SP Z (540 MB)     Info NS (460 MB)     Info EW (250 MB)     Infoes
SP* NS (1.06 GB)     Info EW (1.07 GB)     Infoes

March

Date Instrument Components Notes
03/02 - 03/03 SP Z (740 MB)     Info NS (590 MB)     Info EW (390 MB)     Infoe
SP* Z (1.06 GB)     Info NS (1.05 GB)     Info EW (1.06 GB)     Infoe
03/05 - 03/06 SP Z (880 MB)     Info NS (620 MB)     Info EW (570 MB)     Infoe
SP* Z (1.04 GB)     Info NS (1.05 GB)     Info EW (1.05 GB)     Infoe
LP Z/EW (300 MB)     Info Z/EW (300 MB)     Infoe
03/06 - 03/07 SP Z (650 MB)     Info NS (470 MB)     Info EW (340 MB)     Infoe
SP* EW (1.06 GB)     Infoe
LP Z/EW (370 MB)     Info Z/EW (370 MB)     Infoes
03/07 - 03/08 SP Z (620 MB)     Info NS (410 MB)     Info EW (340 MB)     Infoe
SP* Z (1.07 GB)     Info NS (1.06 GB)     Info EW (1.06 GB)     Infoe
LP Z/EW (490 MB)     Info Z/EW (490 MB)     Info
03/08 - 03/09 SP Z (610 MB)     Info NS (670 MB)     Info EW (430 MB)     Info
LP Z/EW (330 MB)     Info Z/EW (330 MB)     Infoe
03/19 - 03/20 SP Z (570 MB)     Info NS (590 MB)     Info EW (510 MB)     Infoe
LP Z/EW (400 MB)     Info NS (440 MB)     Info Z/EW (400 MB)     Infoe
03/20 - 03/21 SP Z (530 MB)     Info NS (490 MB)     Info EW (390 MB)     Infoe
SP* Z (1.06 GB)     Info e
LP Z/EW (280 MB)     Info Z/EW (280 MB)     Infoe
LP* Z/EW (1.06 GB)     Info Z/EW (1.06 GB)     Infoe
03/20 - 03/22 LP NS (220 MB)     Info e
03/22 - 03/24 LP NS (180 MB)     Info
03/23 - 03/24 SP Z (320 MB)     Info NS (270 MB)     Info EW (190 MB)     Infoe
SP* Z (1.05 GB)     Info NS (1.05 GB)     Info EW (1.04 GB)     Infoe
LP Z/EW (230 MB)     Info Z/EW (230 MB)     Infoe
03/27 - 03/28 SP Z (360 MB)     Info NS (370 MB)     Info EW (250 MB)     Infos
SP* EW (1.05 GB)     Infos
03/28 - 03/29 SP Z (410 MB)     Info s

April

Date Instrument Components Notes
04/01 - 04/02 SP Z (520 MB)     Info NS (450 MB)     Info EW (120 MB)     Infob
SP* Z (1.05 GB)     Info b
04/03 - 04/04 SP Z (340 MB)     Info NS (530 MB)     Info EW (300 MB)     Info
04/05 - 04/06 SP Z (270 MB)     Info NS (610 MB)     Info EW (290 MB)     Infoe
LP Z/EW (270 MB)     Info Z/EW (270 MB)     Infoe
LP* Z/EW (1.05 GB)     Info Z/EW (1.05 GB)     Infoe
04/05 - 04/07 LP NS (380 MB)     Info e
04/07 - 04/08 SP Z (370 MB)     Info NS (610 MB)     Info EW (330 MB)     Infose
SP* Z (1.07 GB)     Info NS (1.06 GB)     Info EW (1.06 GB)     Infose
04/12 - 04/13 SP Z (760 MB)     Info NS (790 MB)     Info EW (680 MB)     Infos
04/14 - 04/15 SP Z (710 MB)     Info
04/15 - 04/16 SP Z (630 MB)     Info NS (790 MB)     Info EW (470 MB)     Info
LP Z/EW (380 MB)     Info Z/EW (380 MB)     Infoe
04/15 - 04/17 LP NS (430 MB)     Info
04/16 - 04/17 SP Z (650 MB)     Info NS (890 MB)     Info EW (710 MB)     Infoe
LP Z/EW (710 MB)     Info Z/EW (710 MB)     Info
04/19 - 04/21 LP NS (190 MB)     Info e
04/20 - 04/21 SP Z (370 MB)     Info
Postcard from Louis B. Slichter indicating blast location and time attached
NS (330 MB)     Info EW (280 MB)     Infoeb
SP* Z (1.06 GB)     Info NS (1.05 GB)     Info EW (1.06 GB)     Infoe
LP Z/EW (220 MB)     Info Z/EW (220 MB)     Infoe
04/23 - 04/24 SP Z (230 MB)     Info NS (520 MB)     Info EW (220 MB)     Infoe
SP* Z (1.05 GB)     Info e
LP Z/EW (200 MB)     Info Z/EW (200 MB)     Infoe
04/23 - 04/25 LP NS (180 MB)     Info e
04/24 - 04/25 SP Z (230 MB)     Info NS (400 MB)     Info EW (210 MB)     Infoe
LP Z/EW (200 MB)     Info Z/EW (200 MB)     Info
04/25 - 04/26 SP Z (240 MB)     Info NS (300 MB)     Info EW (210 MB)     Info
04/29 - 04/30 SP Z (360 MB)     Info NS (430 MB)     Info EW (240 MB)     Infoe
SP* Z (1.06 GB)     Info EW (1.06 GB)     Infoe
LP Z/EW (270 MB)     Info Z/EW (270 MB)     Infoe
LP* Z/EW (1.06 GB)     Info Z/EW (1.06 GB)     Infoe
04/29 - 05/01 LP NS (410 MB)     Info e
LP* NS (1.05 GB)     Info e
04/30 - 05/01 SP Z (520 MB)     Info NS (700 MB)     Info EW (370 MB)     Infoe
LP Z/EW (460 MB)     Info Z/EW (460 MB)     Infoe
LP* Z/EW (1.05 GB)     Info Z/EW (1.05 GB)     Infoe

May

Date Instrument Components Notes
04/29 - 05/01 LP NS (410 MB)     Info e
LP* NS (1.05 GB)     Info e
04/30 - 05/01 SP Z (520 MB)     Info NS (700 MB)     Info EW (370 MB)     Infoe
LP Z/EW (460 MB)     Info Z/EW (460 MB)     Infoe
LP* Z/EW (1.05 GB)     Info Z/EW (1.05 GB)     Infoe
05/01 - 05/02 SP Z (690 MB)     Info NS (840 MB)     Info EW (570 MB)     Info
LP Z/EW (600 MB)     Info Z/EW (600 MB)     Infoe
05/01 - 05/03 LP NS (950 MB)     Info e
LP* NS (1.04 GB)     Info e
05/02 - 05/03 SP Z (640 MB)     Info NS (720 MB)     Info EW (630 MB)     Infoe
SP* Z (1.05 GB)     Info NS (1.03 GB)     Info EW (1.05 GB)     Infoe
LP Z/EW (710 MB)     Info Z/EW (710 MB)     Infoe
LP* Z/EW (1.04 GB)     Info Z/EW (1.04 GB)     Infoe
05/05 - 05/06 SP Z (310 MB)     Info NS (330 MB)     Info EW (280 MB)     Infoe
LP Z/EW (260 MB)     Info Z/EW (260 MB)     Infoe
LP* Z/EW (1.06 GB)     Info Z/EW (1.06 GB)     Infoe
05/05 - 05/07 LP NS (260 MB)     Info e
LP* NS (1.06 GB)     Info e
05/07 - 05/08 LP Z/EW (640 MB)     Info Z/EW (640 MB)     Infoe
LP* Z/EW (1.04 GB)     Info Z/EW (1.04 GB)     Infoe

June

Date Instrument Components Notes
06/22 - 06/23 LP Z/EW (180 MB)     Info Z/EW (180 MB)     Infoe
LP* Z/EW (1.06 GB)     Info Z/EW (1.06 GB)     Infoe

July

Date Instrument Components Notes
07/19 - 07/20 SP Z (760 MB)     Info NS (290 MB)     Info EW (220 MB)     Infoe
07/24 - 07/25 SP Z (790 MB)     Info NS (460 MB)     Info EW (210 MB)     Infoe
SP* Z (1.03 GB)     Info e
07/25 - 07/26 SP Z (770 MB)     Info NS (400 MB)     Info EW (240 MB)     Infoe
SP* Z (1.03 GB)     Info NS (1.04 GB)     Info EW (1.04 GB)     Infoe
07/29 - 07/30 SP Z (720 MB)     Info NS (470 MB)     Info EW (240 MB)     Info

August

Date Instrument Components Notes
08/01 - 08/02 SP Z (540 MB)     Info NS (500 MB)     Info EW (220 MB)     Infoe
SP* Z (1.05 GB)     Info e
LP Z/EW (170 MB)     Info Z/EW (170 MB)     Infoe
08/01 - 08/03 LP NS (160 MB)     Info e
08/05 - 08/06 SP Z (720 MB)     Info NS (830 MB)     Info EW (280 MB)     Infoe
SP* Z (1.05 GB)     Info NS (1.03 GB)     Info EW (1.05 GB)     Infoe
08/06 - 08/07 SP Z (730 MB)     Info NS (560 MB)     Info EW (310 MB)     Info
08/11 - 08/12 SP Z (760 MB)     Info NS (550 MB)     Info EW (260 MB)     Infoe
SP* Z (1.03 GB)     Info e
LP Z/EW (190 MB)     Info Z/EW (190 MB)     Infoe
08/11 - 08/13 LP NS (220 MB)     Info e
08/12 - 08/13 SP Z (740 MB)     Info NS (740 MB)     Info EW (370 MB)     Infoe
SP* Z (1.03 GB)     Info NS (1.03 GB)     Info EW (1.04 GB)     Infoe
08/13 - 08/15 LP NS (310 MB)     Info e
08/14 - 08/15 SP Z (730 MB)     Info NS (520 MB)     Info EW (320 MB)     Infoe
LP Z/EW (330 MB)     Info Z/EW (330 MB)     Infoe
08/15 - 08/17 LP NS (230 MB)     Info e
08/16 - 08/17 SP Z (830 MB)     Info NS (770 MB)     Info EW (660 MB)     Infoe
LP Z/EW (300 MB)     Info Z/EW (300 MB)     Infoe
08/17 - 08/19 LP NS (260 MB)     Info e
08/18 - 08/19 SP Z (810 MB)     Info NS (560 MB)     Info EW (310 MB)     Info
LP Z/EW (400 MB)     Info Z/EW (400 MB)     Infoe
08/19 - 08/20 SP Z (890 MB)     Info NS (760 MB)     Info EW (400 MB)     Info
08/23 - 08/24 SP Z (710 MB)     Info NS (660 MB)     Info EW (170 MB)     Info
08/24 - 08/25 SP Z (710 MB)     Info NS (390 MB)     Info EW (190 MB)     Info
SP* Z (1.04 GB)     Info
LP Z/EW (160 MB)     Info Z/EW (160 MB)     Infoe
LP* Z/EW (1.02 GB)     Info Z/EW (1.02 GB)     Infoe
08/25 - 08/26 SP Z (620 MB)     Info NS (280 MB)     Info EW (170 MB)     Info
SP* NS (1.03 GB)     Info
08/28 - 08/29 SP Z (740 MB)     Info NS (400 MB)     Info EW (220 MB)     Info
08/29 - 08/30 SP Z (800 MB)     Info NS (490 MB)     Info EW (260 MB)     Info
SP* EW (1.06 GB)     Info
08/30 - 08/31 SP Z (800 MB)     Info NS (150 MB)     Info EW (310 MB)     Infoe
SP* EW (1.06 GB)     Infoe

September

Date Instrument Components Notes

October

Date Instrument Components Notes

November

Date Instrument Components Notes

December

Date Instrument Components Notes

Date
Dates are given as "m1/d1 - m2/d2" where m1 is the starting month, d1 is the starting day, m2 is the ending month, and d2 is the ending day. For the exact time of the start and end of the record, download the information (back side of seismogram) file that accompanies each seismogram file.
Typically, each recording covers about one day except for some single-component long-period recordings that cover two days.

Instrument
The instrument type is either "SP" for short-period recording and "LP" for long-period recording. The entry "SP*" and "LP*" indicates that it is same as the "SP" and "LP" version, respectively, except that the contrast is set to zero to enhance very faint lines (note that these files are very large, more than 1 GB).

Components
The components are "Z" for vertical, "NS" for north-south, and "EW" for east-west. Some of the long-period recordings have two components, e.g., "Z/EW". The "Z/EW" entries are repeated in the first and third columns under "Components" and they are identical copies.
The link with each component, e.g., Z, allows the image of the seismic recording to be downloaded. Note that the size of the file given in brackets can be large and may take a while to download completely. The image of the back side of each recording (often showing more detailed information about the recording such as the start and end times) can be obtained from the "Info" link. The information files are typically 90 MB.
The image files are in Adobe Photoshop format (.psd).

Notes
If there is obvious earthquake signal on the trace, "e" is written in this field. There are some seismograms which are noisier than typical, and they are denoted with "s" for possible storm activity. There are also some traces which indicate recordings of blast which are denoted by "b". Even if this field is left blank, it does not mean that there is no earthquake recorded on the day. It is often difficult to distinguish between noise and small local earthquake, especially on the short-period recordings.


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Department of Earth and Planetary Sciences / Harvard University / 20 Oxford Street / Cambridge / MA 02138 / U.S.A. / Telephone: +1 617 495 2350 / Fax: +1 617 496 1907 / Email: reilly@eps.hartvard.edu