This is the 7718th most frequent Russian word.
землетрясения
Earthquakes.
Here, 'землетрясения' (earthquakes) is used in the plural form to denote occurrences of a natural phenomenon.
В этом регионе часто происходят землетрясения.
In this region, earthquakes often occur.
In this instance, 'землетрясения' (earthquake) is in the genitive singular form to describe its effects.
Последствия землетрясения были разрушительными.
The consequences of the earthquake were devastating.
Here, 'землетрясения' (earthquake) is in the genitive singular form following the word 'свидетелем' (witness).