Fire balls were observed several months before the main
shock on 6 April. As with foreshock activity which started
to increase in October 2008 (Pondrelli, 2010), reports of fire
balls started in the summer of 2008 and increased in number
till the end of March 2009. Marcelli Gabriella from Poggio
Picence observed a ball of light toward Monte Ocre, about
06:15–06:30 LT at the beginning of March 2009. That morning,
it was still dark and a light was seen along the flank
of the mountain. It was bigger than a street light, the luminous
sphere was yellowish orange. This light remained
midway up the mountain and then it suddenly moved up to
the mountain top and then disappeared behind it. The mountain
profile was visible because it was completely covered in
snow. Another 25 bright spherical bodies were sighted above
the historical center of Aquila, around Roio hill, near Preturo
and Pettino, Collebringioni, Tempera, Bagno, above San
Demetrio, Corvo Mountain, near Passo delle Capannelle, inside
the Celano gorges, near Popoli and Alba Fuciens. Their
white, yellow, orange or red lights were not bright.
Their diameters ranged from a few centimeters to one meter. In
four cases, they appeared in groups of two to four spheres.
In at least eight cases, globular lights were seen moving at
low velocity and in one case at high velocity. Several photos
and videos were collected which documented the phenomena,
see Figs. 2 and 3. Figure 2 is a photogram of a
video recorded on a MOTOROLA RAZR V3i mobile. It was
captured from Madonna della Strada towards Preturo Airport
(East), initially the luminous ball fell from the sky with fast
movements and then it remained suspended above the ground for more
than 30 minutes...