In the new york seismogram the first p wave was recorded at 9: 01 utc , utc is the international standard on which most countries base their time . at what time utc did the earthquake actually occur ?

The UTC or also known as the Coordinated Universal Time is the international standard time used by countries in regulating their time. It is similar to the GMT although the GMT is no longer defined today. UTC does not have daylight saving, so if the wave was recorded at 9:01, then the earthquake did really occur on 9:01 UTC.

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The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass