This is the 11961st most frequent Russian word.
зафиксирована
"Зафиксирована" means "recorded" or "fixed."
In this sentence, 'зафиксирована' is used to indicate that the temperature measurement was officially documented or noted.
Температура была зафиксирована на уровне минус пять градусов.
The temperature was recorded at minus five degrees.
Here, 'зафиксирована' refers to the official logging or noting of an event, specifically an accident.
Зафиксирована авария на центральной улице города.
An accident has been recorded on the central street of the city.
In this context, 'зафиксировано' is used to signify that the start time has been noted and preserved in written form.