Daniel M. Ingram:

The First Vipassana Jhana is the version of the First Samatha Jhana that instead of dwelling in some aspects of stability and the standard jhanic qualities of concentration, effort and bliss, instead looks at the insight-oriented aspects and attains to the following insight stages:

1. Mind and Body
2. Cause and Effect
3. Three Chracteristics

See MCTB The Vipassana Jhanas