This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Bedaccelerograph. Accelerograph picture from the USGS PDUSGov original upload log page en Bedaccelerograph Salsb bytes no picture from the USGS Seismology Accelerometers
Page 2023 Free-images.com. All images are Public Domain