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.
Nagaoka earthquake Distribution of seismic intensity in the vicinity of the epicenter. Nagaoka earthquake jma go jp pdf other versions PDJapanorganization NotPDUSURAA Japan Nagaoka earthquake
Page 2023 Free-images.com. All images are Public Domain