## Appendix A Questionnaire for Data Collection, Published on 14 April 1893  
In order to engage as many people as possible in the task of gathering the earthquake-related data, the following questionnaire was created and sent out immediately through the Serbian Newspaper, Vol. 69, Page 319, 14 April 1893. \"Sir, (1)  
For the study of the earthquakes that shook the Serbian land yesterday and today, as well as those that could yet happen, it would be very useful if you could and would answer some or all of these questions:  
1. What is the name of the place (municipality and county) where you felt the earthquake or learned about it? 2. On what day, at what hour, and if you can tell, at what minute and second did the earthquake happen? Do you also know how big the difference was then between the clock of the telegraph, railway, and generally regulated clock and the one that recorded the time of the earthquake? 3. Where were you when you felt the earthquake: in the field or at home, in the barn near the ground, or on which floor or in the basement? What were you doing at the time, how did you feel it, and did you experience any injury? 4. What type of soil did the shaking occur in--rock, sand, clay, or marsh? 5. How many earthquakes were there, at what intervals, and how long did each one last? 6. Was the earthquake felt as a thrust from below to above, or from the side, or as a turning point, or as a tremor? If there were several earthquakes, were they all of equal size and of the same type, or were they different in strength, duration, and manner? Was the quake equally strong all over the rural or municipal area or not? 7. From which side did the quake come, and where did it go? 8. Was it only the shaking of the house and the household items, or was there also some natural sound and rumbling, and what did it resemble; was it heard before and after the real earthquake, and does the whole earthquake resemble any other phenomenon? 9. What happened as a result of the earthquake, and was there any major damage; did the houses collapse and how much; did any partial collapse occur; which walls cracked and in which direction; in which direction did the cracks in the ground open; how long, wide and deep are the cracks in the ground; and did anything emerge from them? 10. Did any household items move or fall, and if so, in which direction? For example, did any lamps, pictures, or icons sway? Did the bells automatically ring? 11. Did the water in the springs and wells remain unchanged? Did the water in the ponds move during the earthquake, and how? 12. Was there any effect of the earthquake on the animals, the air, and the weather? 13. What did you learn from your countrymen about the earthquake in your area? Do you know someone who would be happy to answer these questions about earthquakes?What have you heard from older people about earthquakes in your area? Please address your answer to the Geological Institute of the Great School in Belgrade, which is assigned to collect all the data about these earthquakes and will be very grateful if you answer even just a few questions. I am also asking you not to try too hard to answer all the questions, but to write only about what you know and what serious people have told you. On Easter 1893, in Belgrade,  
[PERSON], Professor and Administrator of the Geological Institute of the Great School\". \({}^{(1)}\) We ask all Serbian newspapers to print this advertisement, and all literate Serbs to respond to it. NOTE: In addition, all editorial offices of Serbian newspapers were asked to send to the Geological Institute those issues, in which there would be any reports about the earthquake; but the Geological Institute did not receive as much and the kind of support from this side as it had hoped.