Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 11 · Rain, Kurma Chakra, Utpata
वृष्टिः कूर्मचक्रम् उत्पाताश्च
एवमाद्या हि दृश्यंते विकाराः प्रतिमासु च ।गंधर्वनगरं चैव दिवा नक्षत्रदर्शनम् ॥ ७४८ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 748.
Such changes are seen in images. So are a Gandharva city in the sky and stars seen by day.
Simple meaning: Such changes in images, a city of Gandharvas in the sky and stars seen by day are portents.
महोल्कापतनं काष्ठतृणरक्तप्रवर्षणम् ।
A big meteor, a rain of wood, grass or blood, smoke in the directions and earthquakes are portents.
अनग्नौ च स्फुलिंगाश्च ज्वलनं च विनेंधनम् ।
Sparks without fire, burning without fuel, a rainbow and a frog at night, and a white crow on a peak are portents.
दृश्यंते विस्फुलिंगाश्च गोगजाश्वोष्ट्रगात्रतः ।
Sparks on cattle, elephants, horses and camels, and creatures born with two or three heads, are portents.