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Sonic Boom

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Houston-area meteor shatters in the sky, triggering sonic booms, NASA says
science19 days ago

Houston-area meteor shatters in the sky, triggering sonic booms, NASA says

NASA says a bright meteor over southeastern Texas likely broke apart above the Houston area after streaking around 35,000 mph; the roughly 3-foot, one-ton rock caused sonic booms heard in the region and Doppler radar suggests meteorites may have dropped between Willowbrook and Northgate Crossing, with at least one homeowner reporting a rock in her home; this comes days after a separate daytime fireball over Ohio and Pennsylvania.

via NBC News|
#houston#meteor#nasa
F-4 Phantom II: NASA’s Versatile Sky Laboratory for Aerodynamics and Sonic Booms
aviation-history20 days ago

F-4 Phantom II: NASA’s Versatile Sky Laboratory for Aerodynamics and Sonic Booms

NASA’s Flight Research Center used variants of the McDonnell F-4 Phantom II from 1965 to the mid-1980s for a range of research, including biomedical monitoring flights with instrumented pilots (and monkeys), sonic-boom experiments near Ely, Nevada, and later spanwise blowing studies on the F-4C to probe boundary-layer control and lift, illustrating the aircraft’s versatility before returning to the U.S. Air Force.

via Vintage Aviation News|
#aerodynamics#aviation-history#biomedical-research
X-59 Quiet Supersonic Jet Preps for Second Test Flight
technology23 days ago

X-59 Quiet Supersonic Jet Preps for Second Test Flight

NASA's X-59 Quiet Supersonic aircraft, built with Lockheed Martin, is preparing for its second test flight at NASA's Armstrong Flight Research Center in California. After its first flight in October 2025, the mission will have the aircraft take off from Armstrong, fly for about an hour, reach up to 20,000 feet and roughly 260 mph, and progressively fly faster and higher to test its reduced-boom sonic concept intended to enable overland supersonic flight.

via Space|
#edwards-air-force-base#nasa#sonic-boom
Daytime fireball over Ohio: 7-ton meteor explodes with sonic boom across the eastern U.S.
space23 days ago

Daytime fireball over Ohio: 7-ton meteor explodes with sonic boom across the eastern U.S.

A fridge-sized, ~7-ton meteor lit up the daytime sky over Ohio on March 17, streaking at about 40,000 mph before exploding about 30 miles up near Valley City and producing a bright fireball lasting up to seven seconds along with a sonic boom. The event was captured by eyewitnesses, the NOAA GOES-19 satellite, and is thought to have scattered possible meteorites near Akron; such daytime fireballs are rare but can leave ground debris.

via Live Science|
#daytime-fireball#meteor#meteoroids
Tape Screech Demystified: Tiny Sonic Booms From Adhesive Cracks
science1 month ago

Tape Screech Demystified: Tiny Sonic Booms From Adhesive Cracks

Physicists explain Scotch tape’s open‑air screech as a sequence of tiny, sideways cracks in the adhesive that form as you peel. These cracks open nanoscopic gaps between tape and surface; air can’t rush in fast enough to fill them, so a pressure pulse travels with each crack to the tape’s edge and collapses into the surrounding air, producing the audible screech. High‑speed cameras and synchronized microphones linked each pulse to a crack reaching the edge. The same team noted earlier vacuum experiments can emit X‑rays with tape flown in a perfect vacuum, but the in‑air screech comes from the crack‑driven pressure pulses.

via Boing Boing|
#acoustics#crack-propagation#physics
Earthquake sensors offer real-time tracking for reentering space junk
space-exploration2 months ago

Earthquake sensors offer real-time tracking for reentering space junk

Researchers propose using a global network of seismic sensors to detect sonic booms from space debris as they reenter Earth, enabling reconstruction of their trajectories and potentially pinpointing where fragments might land. In a 2024 Shenzhou 17 module event, 127 California seismic stations recorded the sonic boom, revealing the debris path differed from orbital predictions and suggesting ground impact could occur between Bakersfield and Las Vegas; the approach could speed up locating debris and inform risk assessments, with future work expanding to acoustic sensors over oceans. The study, published in Science, highlights how quake networks could augment current radar/optical tracking in space situational awareness.

via Space|
#reentry#seismic-sensors#sonic-boom
SpaceX Falcon 9 Launch From Vandenberg Promises Sonic Boom Across Central California
technology2 months ago

SpaceX Falcon 9 Launch From Vandenberg Promises Sonic Boom Across Central California

SpaceX will launch a Falcon 9 rocket from Space Launch Complex-4 at Vandenberg Space Force Base in Santa Barbara County between 8:18 p.m. and 8:53 p.m. on Friday, with a backup window at 8:04 p.m. Saturday if needed. The first-stage booster, making its second flight, will return to Landing Zone 4 about seven minutes after liftoff. The mission, designated NRL-105 for the National Reconnaissance Office, could produce a sonic boom audible across Santa Barbara, Ventura and San Luis Obispo counties and may be visible from parts of California; a live webcast is available at spacex.com, and local viewing spots around the Lompoc Valley are recommended.

via Noozhawk|
#falcon-9#nrl-105#sonic-boom
SpaceX's Upcoming Vandenberg Launch to Deliver Italy's COSMO-SkyMed Satellite
science3 months ago

SpaceX's Upcoming Vandenberg Launch to Deliver Italy's COSMO-SkyMed Satellite

A sonic boom advisory has been issued for a planned SpaceX Falcon 9 launch from Vandenberg Space Force Base on Saturday evening, targeting the COSMO-SkyMed Second Generation mission for the Italian Space Agency, with a backup launch opportunity on Sunday. The first stage of the rocket is expected to land back on Vandenberg, producing a sonic boom audible in surrounding communities.

via KSBY News|
#falcon-9#launch#science