| Official Name: | In Eker |
| Settlement Type: | Village |
| Pushpin Map: | Algeria |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 300 |
| Subdivision Type: | Country |
| Subdivision Name: |  Algeria |
| Subdivision Type1: | Province |
| Subdivision Name1: | Tamanrasset Province |
| Subdivision Type2: | District |
| Subdivision Name2: | Tamanrasset District |
| Subdivision Type3: | Commune |
| Subdivision Name3: | In Amguel[1] |
| Unit Pref: | Metric |
| Utc Offset: | +1 |
| Coordinates: | 24.0231°N 5.0808°W |
| Elevation M: | 991 |
In Eker (also written as I-n-Eker or In Ekker) is a village in the commune of In Amguel,[1] in Tamanrasset District, Tamanrasset Province, Algeria. It lies on the N1 national highway 39km (24miles) north of In Amguel and 145km (90miles) north of Tamanrasset city.[2]
In Eker has a hot desert climate (Köppen climate classification BWh), with hot summers and mild winters, and very little precipitation throughout the year.
In the 1960s In Eker was the scene of several underground nuclear tests conducted by the French military. They included the now infamous Béryl incident which released a cloud of radioactive dust outside the tunnel entrance, contaminating officials viewing the test.
In 1999 the International Atomic Energy Agency conducted tests at the site and found that some radioactive contamination remained on the surface. This was in the form of several isotopes with Caesium-137 being the most prominent. Their report concluded that Nomadic pastoralism through the adjacent areas would result in exposures of around 50μSV/year, however
Persons scavenging metals in the immediate vicinity of the E2 [test] tunnel might receive doses up to 0.5mSv in 8 hours. Currently, external exposure rates are less than one-tenth those existing in 1966.The study further found alpha particle emission from the solidified lava is roughly the same as the surrounding natural rock, which has some naturally occurring uranium. To date, some limited follow up by French personnel has taken place, but no long-term study of the native population, nor the aquifers in the area has been done.
Neighbouring towns and cities