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Questions

1. Earthquake of_____day_____month_____year_____
2. Place_____
3. Time of day (standard time)_____
4. How accurate is your time?_____
5. Number of shocks_____duration of each_____
6. Intensity of each shock_____
7. Direction of each shock_____
8. Horizontal or vertical motion?_____
9. Effect of the shock_____
10. Remarks_____
11. Name, occupation, and address of the observer_____

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QUESTIONS REGARDING THE EARTHQUAKE OF

1. Date of shock.
2. Observer's name, address and occupation.
3. Location of Observer at the time of shock.
   • State_____County_____
   • Town or location in County_____; or Range_____Township_____
   • Section_____Position in Section_____
4. Situation of Observer.
   1. Indoors (on what floor) or in open air?
   2. Position and occupation at the movement of the shock.
5. Character of the ground:
   1. On a mountain slope?
   2. On a river bottom?
   3. Was rock near surface? how near?
   4. Give a shortdescription [sic] of the topography.
6. Time and character of the shock.
   1. How many shocks were felt?
   2. How long did each last?
   3. Length of interval between them?
   4. Was there any tremulous motion before or after the shocks?
   5. Describe your general impression of the character of the shocks?
   6. What were the times of the several shocks?

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   7. How was the time determined and how accurate do you consider it?
   8. Were clocks stopped? time.
   9. Were these clocks fast or slow? By how much?
   10. What were the lengths of the pendulums?
   11. In what direction did clocks face? [End Page 1]
7. Direction of motion of each shock:
   1. Was any vertical motion felt?
   2. Inferred?_____how?
   3. Was there any horizontal motion?_____in what direction?
   4. Was there any rotary motion felt?
   5. Inferred?_____how?
   6. With or against the hands of the clock?
   7. Were objects turned on their supports? How much_____In what direction.
   8. Were hanging objects swung in a circle? In what direction?
   9. In what direction was the disturbance propagated?
8. Intensity of the shocks.
   1. What number do you estimate for the intensity of each shock according to the Rossi-Forel Scale?
   2. How do you form this estimate?
   3. If buildings were damaged state nature of damages and the character of the buildings.                      

      I.	Perceptible, only by delicate instruments.
      II.	Very slight, shocks noticed by few persons at rest.
      III.	Slight shocks, of which duration and direction was noted by a number of persons.
      IV.	Moderate shock, reported by persons in motion; shaking of moveable objects; cracking of ceilings.
      V.	Smart shock, generally felt; furniture shaken; some clocks stopped; some sleepers awakened.
      VI.	Severe shock, general awakening of sleepers; stopping of clocks; some window glass broken. [End Page 2]
      VII.	Violent shock, overturning loose objects; falling of plaster; striking of church bells; some chimneys fall.
      VIII.	Fall of chimneys; cracks in the walls of buildings.
      IX.	Partial or total destruction of some buildings.
      X.	Great disasters; overturning of rocks; fissures in the surface of the earth; mountain slides.

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9. Sound Phenomena.
   1. Was any sound heard at the time of the earthquake? If so describe its character?
   2. Did it precede, coincide with, or follow, the shock?
10. Note any other phenomena which may be related to the earthquake, such as effects on anumals [sic], on springs or streams, displacements of the soil, meteorological changes, etc.
11. What reports have you heard from your general neighborhood?
12. Please forward local newspaper clippings relative to the shocks?

Please answer as many questions as possible, number and letter the answers to correspond with the questions and forward to

About this text
Courtesy of The Bancroft Library, University of California, Berkeley, CA 94720-6000; http://bancroft.berkeley.edu/
http://content.cdlib.org/view?docId=hb109nb0wj&brand=oac4
Title: Andrew C. Lawson papers, 1885-1951.: Earthquake Investigation Commisson, Survey Questions: Earthquake Questionnaire
By:  Lawson, Andrew C. (Andrew Cowper), 1861-1952
Date: [1906-1907?]
Contributing Institution: The Bancroft Library, University of California, Berkeley, CA 94720-6000; http://bancroft.berkeley.edu/
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