📜 Fully functional seismological measuring station and a walk-through museum of technology.🔍 Houses historical and modern seismographs, including the world's oldest fully functional one. Features a 17-ton pendulum and the 4-ton Mintrop Ball for artificial earthquakes.# Why Go🌍 Witness the world's oldest functional seismograph.💥 See the 4-ton Mintrop Ball dropped to create artificial earthquakes.🔬 Explore historical and modern seismographs and scientific instruments.🔬 Explore the Old Earthquake Vault with a 17-tonne pendulum, the world's heaviest seismograph.🎓 Learn about Emil Wiechert, the world's first professor of geophysics, and his contributions.🌍 Discover the history of seismic exploration and geomagnetism.# Why Avoid🥶 Interior rooms can be cold, bring warm clothing.☔ Mintrop ball drop is weather permitting.# Tips🗓️ Public tours and ball drops on first Sunday of every month, 2-5 p.m.👥 Special guided tours for groups can be arranged.🚶‍♀️ Wear weatherproof clothing for outdoor tour parts; earthquake houses are cool, bring a jumper or jacket.🆓 All guided tours are free, voluntary donations welcome.# Cost💰 Free guided tours, voluntary donations welcome.# Hours🕒 First Sunday of every month, 2 p.m. - 5 p.m. for Mintrop ball release and tours. Special group tours by appointment.