(meteorobs) Chelyabinsk event - what was precise time? Any radiodata?

[drobnock]

 (meteorobs) Chelyabinsk event - what was precise time? Any radiodata?
Thomas,
Not certain if this site was referenced to you about the Chelyabinsk
Event:
http://www.iris.edu/hq/news/story/waves_generated_by_russian_meteor_detected_crossing_the_us

IRIS (Incorporated Research Institutions for Seismology) presented this
information: "The Chelyabinsk meteor exploded in the atmosphere at
approximately 03:20 GMT (9:20 AM local time) on February 15. The
pressure wave from the blast caused significant damage in the city,
breaking thousands of windows and injuring more than 1000 people. The
energy from the blast created pressure waves in the atmosphere that
rapidly moved outward from the terminal burst and spread around the
globe. The downward directed blast coupled into the ground and spread
outward as a seismic wave in the Earth. These two waves – the seismic
wave in the Earth and the pressure wave in the atmosphere – travel at
very different speeds. The waves in the ground travel quickly – at about
3.4 km per second – and attenuate rapidly, whereas the waves in the
atmosphere are much slower (~0.3 km per second) and can travel great
distances."

This report a PDF shows the detected pressure waves to North America:
http://www.iris.edu/hq/files/Russian_Meteor_02262013.pdf

I was expecting European VLF stations to detect a signature at the time
of the event. As I presented to you, the Tunguska Event was  of similar
power and at the time receivers, ever so simple,  were in operation but
there was never any mention of a strange signature on the day of the
event.
Hope this helps.
George John Drobnock



Does anyone know the precise timings of the Chelyabinsk meteor strike?
General timing was at 03:20 UTC on February 15, 2013.

When did the ionization begin? Was there a radio meteor signature
seconds before it became visible? Are there any VHF forward scatter
captures?

It appears that the strike was recorded very well in infrasound all
around the globe.

Is there any evidence of the strike in ULF or ELF or VLF radio data
anywhere in the world?

Any info welcome!  Thank you in advance.

Thomas Ashcraft  -  Heliotown  -  New Mexico