SeismoArchives

Seismograms of the 1906 Valparaiso (Chile) Earthquake:
(Last updated: August 21, 2004)

The following collection of seismograms was scanned at 300 dpi, 8-bit gray scale by
BMI Imaging Systems, Sunnyvale, CA, USA, in May-June of 2000,  from
"Seismogramme des nordpazifischen und sunamerikanischen Erdbebens am 16. August 1906",
by E. Rudolph and E. Tams, published by the International Association of Seismology, Strassburg, 1907.

Samples were scanned at 200 dpi and 400 dpi, 8-bit gray scale. Due to cost consideration,
the seismograms were finally scanned at 300 dpi, 8-bit gray scale in actual size. The collection
of seismograms contain 123 individual records and the scanned image files were "video edited"
by W. H. K. Lee using the PaperPort Deluxe9 software of Scansoft, Inc.

Since many original seismograms are 90 cm long, many records contain sections of the
original seismogram in order to fit into the published paper size (about 32 by 45 cm with
margins for annotation). Because some records contain seismograms from two or more
different stations they were separated into different image files, resulting in a total of 160 files.

For rapid viewing, the edited image files were saved in this Website at large "quality" reduction
in PDF format, but the original edited image files are archived at IRIS Data Center for download
at the scanned 300 dpi resolution.

Seismograms are organized by station as follows, with brief indication of the instrument and
component. Because the 1906 Aleutian Island (USA) earthquake (Mw=7.8) occurred about
30 minutes prior to the 1906 Valparaiso (Chile) earthquake (Mw=8.5), care must be exercised
in using the following seismograms as noted by Omori (1907).

ACHALKALAKI: Bosch N-S horizontal.

ALBANY(NY)_I:  Bosch N-S horizontal.  ALBANY(NY)_II: Bosch E-W horizontal.

APIA_I: Wiechert N-S horizontal.  APIA_II: Wiechert E-W horizontal.

ATHEN: Agamennon Seismometrograph.

BALTIMORE: Bosch N60W horizontal.

BARCELONA: Vicentini Microseismograph.

BATAVIA: Rebeur-Ehlert N-S horizontal.

BEIRUT: Milne horizontal.

BIDSTON: Milne horizontal.

BOMBAY: Colaba N-S horizontal, and Milne E-W horizontal.

BORSHOM: Bosch N-S horizontal, and Bosch E-W horizontal.

BUDAPEST: Bosch N-S horizontal. Bosch E-W horizontal.

CAGGIANO: Agamennone Seismometrograph.

CALCUTTA: Milne E-W horizontal.

CARLOFORTE: Vicentini Microseismograph.

CATANIA_I, and CATANIA_II: Vicentini 3-components. 
CATANIA_III, and  CATANIA_IV: Grosser Seismometrograph.
CATANIA_V: Grosser Seismometrograph and Vicentini Microseismograph.

CHELTENHAM_I: Bosch N-S horizontal.  CHELTENHAM_II: Bosch E-W horizontal.

COIMBRA: Milne horizontal.

CORDOBA: Milne E-W horizontal.

EDINBURGH: Milne E-W horizontal.

FLORENZ_I: at Collegio della Querce -- Stiattesi N49W-S49E horiziontal.
FLORENZ_II: at Collegio della Querce -- Stiattesi N49W-S49E and N40E-S40W horiziontals.

FLORENZ_III, and FLORENZ_IV: at Ximeniano -- Stiattesi horizontal.
FLORENZ_V, FLORENZ_VI, and  FLORENZ_VII: at Ximeniano -- Vicentini vertical.
FLORENZ_VIII, and FLORENZ_IX: at Ximeniano -- Stiattesi horizontal.

GOTTINGEN_I: Wiechert N-S horizontal.  GOTTINGEN_II: Wiechert E-W horizontal.
GOTTINGEN_III: Wiechert vertical.  GOTTINGEN_IV: 17-ton Wiechert N-S horizontal.

GRANADA_I, GRANADA_II, GRANADA_III, GRANADA_IV, and GRANADA_V: Stiattest horizontals.

HAMBURG_I: Wiechert N-S horizontal. HAMBURG_II: Wiechert E-W horizontal.
HAMBURG_III: Hecker N-S horizontal.  HAMBURG_IV: Hecker E-W horizontal.

HEIDELBERG_I: Wolf N-S horizontal.  HEIDELBERG_II: Wolf E-W horizontal.

HELWAN(Cairo): Miln E-W horizontal.

HOHENHEIM_I: Bosch N-S horizontal, and Schmidt Trifilargravimeter.
HOHENHEIM_II: Bosch E-W horizontal, and Schmidt Trifilargravimeter.

HONOLULU: Milne horizontal.

ISCHIA_I: at Grande Sentinella -- Grablowitz horizontals, and Vasca Sismica;
ISCHIA_II: at Porto d'Ischia -- Grablowitz horizontals, and Vasca Sismica;

JENA_I: Wiechert N-S horizontal.  JENA_II: Wiechert E-W horizontal.

JURJEW_I: Zollner horizontals.   JURJEW_II: Zollner E-W horizontal.

KALAMATA: Agamennone E-W horizontal.

KAPSTADT: Milne horizontal.

KEW: Milne E-W horizontal.

KODAIKANAL(Madras): Milne horizontal.

KRAKAU: Bosch horizontals.

KREMSMUNSTER: Rebeur-Ehlert horizontals.

LAIBACH_I, and LAIBACH_II: Vicentini Microseismograph.
LAIBACH_III, and LAIBACH_IV: Grablowitz-Belar horizontals, and Rebeur-Ehlert E-W horizontal.
LAIBACH_V: Rebeur-Ehlert horizontals.

LEIPZIG_I: Wiechert N-S horizontal.  LEIPZIG_II: Wiechert E-W horizontal.

LEMBERG: Rebeur-Ehlert N-S horizontal.

MANILA_I, MANILA_II, MANILA_III, and MANILA_IV: Vicentini Microseismograph.

MESSINA: Vicentini Microseismograph.  
MESSINA_I, and MESSINA_II: Agamennone vertical.
MESSINA_III: Vicentini Microseismograph.

MIINCHEN_I: Wiechert N-S horizontal.   MIINCHEN_II: Wiechert E-W horizontal.

MONCALIERI: Stattesi horizontals.

OGYALLA: Bosch horizontals.

OSAKA_I, and OSAKA_II: Omori E-W horizontal.

PADUA_I, PADUA_II, and PADUA_III: Vicentini Microseismograph.

PAISLEY: Milne horizontal.

PAPA_I, PAPA_II, PAPA_III, and PAPA_IV: Agamennone Microseismograph.
PAPA_V: N-S horizontal.  PAPA_VI: N-S horizontal, and Agamennone Seismograph.
PAPA_VII: E-W horizontal.

PARIS: Milne N-S horizontal, and Milne E-W horizontal.

PERTH: Milne horizontal.

POLA: Vicentini Microseismograph.

PONTA DELGATA: Milne horizontal.

POTSDAM_I: Wiechert N-S horizontal.   POTSDAM_II: Wiechert E-W horizontal.
POTSDAM_III: Hecker horizontals.

RIO DE JANEIRO_I: Bosch N-S horizontal.  RIO DE JANEIRO_II: Bosch E-W horizontal.

SAN FERNANDO: Milne horizontal.

SARAJEVO_I, and SARAJEVO_II: Vicentini Microseismograph.

SIKAWEI: Omori E-W horizontal.

SIMLA: Omori N-S horizontal.

SOFIA: Bosch horizontals.

STRASSBURG_I: Wiechert N-S horizontal.   STRASSBURG_II: Wiechert E-W horizontal.
STRASSBURG_III: Bosch N-S horizontal.
STRASSBURG_IV, and STRASSBURG_V: Vicentini Microseismograph.
STRASSBURG_VI: Rebeur-Ehlert N-S horizontal. and Schmidt Trifilargravimeter vertical.

TACUBAYA_I: Bosch N-S horizontal.   TACUBAYA_II: Bosch E-W horizontal.

TASCHKENT_I: Bosch E-W horizontal.   TASCHKENT_II: Zollner-Repsold horizontals and Milne N-S horizontal.

TIFLIS_I: Zollner N-S horizontal, and Milne E-W horizontal.
TIFLIS_II: Bosch E-W horizontal.   TIFLIS_III: Bosch (reserved) E-W horizontal.
TIFLIS_IV, and TIFLIS_V: Rebeur-Ehlert, and Bosch E-W horizontal.
TIFLIS_VI, TIFLIS_VII, and TIFLIS_VIII: Cancani N-S horizontal.

TOKIO_I, and TOKIO_II: Omori E-W horizontal.

TORONTO: Milne E-W horizontal.

TORTOSA_I, TORTOSA_II, and TORTOSA_III: Vicentini Microseismograph.
TORTOSA_IV: Vicentini Microseismograph, and Grablowitz horizontal.

TRIEST: Rebeur-Ehlert horizontal.. 
TRIEST_I, TRIEST_II, and TRIEST_III: Vicentini Microseismograph.

UCCLE_I: Bosch N-S horizontal.   UCCLE_II: Bosch E-W horizontal.
UCCLE_III: Rebeur-Ehlert horizontals.

UPSALA_I: Wiechert N-S horizontal.   UPSALA_II: Wiechert E-W horizontal.

VICTORIA: Milne horizontal.

VIEQUES_I: Bosch N-S horizontal.   VIEQUES_II: Bosch E-W horizontal.

WASHINGTON(DC)_I: Bosch N-S horizontal.   WASHINGTON(DC)_II: Bosch E-W horizontal.

WELLINGTON: Milne horizontal.

WIEN_I: Wiechert N-S horizontal.   
WIEN_II, and WIEN_III: Vicentini Microseismograph.
WIEN_IV: Vicentini Microseismograph, and Rebeur-Ehlert horizontal.

ZAGREB: Vicentini Microseismograph.