in a solar eclipse, the moon blocks the light of the sun from the earth. it can only happen when the moon is between the earth and the sun.
the shadow of the moon has two parts. the inner part is called the umbra. it completlly blocks the sun is light. the outer part is called the penumbra. here the light is only partially blocked.
on october 24, ten thai provinces will be in the umbra and will see total eclipse. the rest of thailand will be in the penumbra and will see a partial eclipse.
during a solar eclipse, the umbra is very narrow on the earth is surface. so solar eclipses do not happen often in any one place on the earth.
the next eclipse in thailand will be in wakor,prachuap khiri khan, on april 2070-75 years from now.