Hindu and Buddhist iconography share some mudras. In some regions, for example in Laos and Thailand, these are distinct but share related iconographic conventions.
A Buddha image can have one of several common mudras, combined with different asanas. The main mudras used represent specific moments in the life of Gautama Buddha, and are shorthand depictions of these.
In Mahayana Buddhism, the deities are often portrayed as pairing the Abhaya Mudrā with another Mudrā using the other hand.
In South-East and East Asia this mudra (also called the Maravijaya attitude) may show Buddha's fingers not reaching as far as the ground, as is usual in Indian depictions.