You Do Need power plug adapter while traveling from Israel to Somaliland.

Here is Why You Need An Adapter

The outlet and plug type used in Somaliland is G and in Israel are C and H. This is how they look like.

Israel

In Israel, outlets of type C and H are in use.

Type C

Type H

Somaliland

In Somaliland, outlets of type G are in use.

Type G