Aurora vs Kofu

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An aurora (plural: auroras or aurorae), sometimes referred to as polar lights (aurora polaris), northern lights (aurora borealis), or southern lights (aurora australis), is a natural light display in the Earth's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic). Auroras are the result of disturbances in the magnetosphere caused by solar wind. These disturbances are sometimes strong enough to alter the trajectories of charged particles in both solar wind and magnetospheric plasma. These particles, mainly electrons and protons, precipitate into the upper atmosphere (thermosphere/exosphere).

The resulting ionization and excitation of atmospheric constituents emit light of varying color and complexity. The form of the aurora, occurring within bands around both polar regions, is also dependent on the amount of acceleration imparted to the precipitating particles. Precipitating protons generally produce optical emissions as incident hydrogen atoms after gaining electrons from the atmosphere. Proton auroras are usually observed at lower latitudes.

Source: Wikipedia

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Kōfu (甲府市, Kōfu-shi, Japanese: [ko̞ːɸɯᵝ]) is the capital city of Yamanashi Prefecture, Japan. As of 1 April 2019, the city had an estimated population of 187,985 in 90,924 households, and a population density of 880 persons per km2.

The total area of the city is 212.41 square kilometres (82.01 sq mi). Kōfu's name means "capital of Kai Province". During the Sengoku period, it was famous as the stronghold of Takeda Shingen.

Source: Wikipedia