Most natural objects that reach us are tiny: they burn up as bright fireballs (bolides) high in the atmosphere. Here are recent events, energy measured in kilotons.
Off the coast of Iceland
EnergyiTNT-equivalent. For scale, Hiroshima was ~15 kilotons.
420t
Date
05-29
Bay of Bengal
EnergyiTNT-equivalent. For scale, Hiroshima was ~15 kilotons.
910t
Date
05-21
Nearest to you
Western Sahara
EnergyiTNT-equivalent. For scale, Hiroshima was ~15 kilotons.
130t
Date
05-12
South Pacific
EnergyiTNT-equivalent. For scale, Hiroshima was ~15 kilotons.
270t
Date
04-30
Events of this size pose no danger — they're the routine background of a solar system still full of debris. Roughly one Hiroshima-scale airburst occurs harmlessly in the upper atmosphere each year.