Brihat Samhita
चत्वार्यार्यम्णाद्यान्यादित्यं मृगशिरो अश्वयुक्चैति । मण्डलं एतद्वायव्यं अस्य रूपाणि सप्ताहात् ॥ ३२-०८ ॥
The asterisms of Uttaraphālguni, Hasta, Citrā, Svāti, Punarvasu, Mṛgaśīrṣa and Aśvinī are known as the circle or division of Vāyu. The previous symptoms of an earthquake of Vayu occurring when the Moon is in any of these seven asterisms, will last for seven days.
english translation
catvAryAryamNAdyAnyAdityaM mRgaziro azvayukcaiti । maNDalaM etadvAyavyaM asya rUpANi saptAhAt ॥ 32-08 ॥
hk transliteration by Sanscript