I think you are a troll account as the information you seek is readily available. Even the Wikipedia page for Haplogroup T demonstrates how T1a is a subclade of T-M70. Why would Somalispot be the first search result for T-M70 or T1a?
For the record.
E1b1b is found in high percentages among all North-East African ethnic groups; even among Semitic speaking Habasha and Nilo-Saharan/Nilotic speakers. It is not only Somalis and Oromos that have high percentages of E1b1b/E-V32. Along with Haplogroup A, think of it as a basal African genetic lineage. Eurasian migrations into Africa brought Haplogroups J and T. Nonetheless, this did not occur in one solitary migratory event and some subclades of J and T have been in Africa longer than others.
The Oromos obviously have more paternal genetic diversity than Somalis due to their expansion and assimilation of other ethnic groups in the Horn. So do the Semitic speaking Habasha as African E1b1b and Haplogroup A lineages are also commonly found among them. Nonetheless, just like Somali clans, it is highly likely that certain Habasha and Oromo clans will possess haplogroup combinations unique to them. For instance, the Shewa Oromo and some Arsis might possess higher percentages of Haplogroup J than the Borans as a result of their historical adoption of Habashas.