jijin.plusbeauxjours.com — data and asset credits
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Earthquake data
  U.S. Geological Survey, Earthquake Hazards Program, "All Earthquakes, Past Day" GeoJSON feed
  https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_day.geojson
  "USGS-authored or produced data and information are considered to be in the U.S. Public Domain."
  https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits
  Credit: U.S. Geological Survey. This site is not affiliated with or endorsed by the USGS.
  Place names in the feed are USGS strings based on GeoNames.

Land outlines (public/land-110m.json)
  Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com (public domain).
  https://www.naturalearthdata.com/about/terms-of-use/
  TopoJSON conversion: world-atlas v2 by Mike Bostock, ISC licence (below).

City coordinates (src/data/origins.json)
  - 17 Korean city/provincial halls: Kakao Local place search (coordinates quoted).
  - Pohang, Gyeongju, Seattle, Portland, Salt Lake City, Anchorage, Honolulu:
    © OpenStreetMap contributors (Nominatim), ODbL 1.0 — https://www.openstreetmap.org/copyright
  - Other world cities: Natural Earth populated places (public domain).

Fonts (SIL Open Font License 1.1)
  Pretendard (Kil Hyung-jin), Atkinson Hyperlegible Next (Braille Institute), Bricolage Grotesque (Mathieu Triay).

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world-atlas — ISC License

Copyright 2013-2019 Michael Bostock

Permission to use, copy, modify, and/or distribute this software for any purpose
with or without fee is hereby granted, provided that the above copyright notice
and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
THIS SOFTWARE.