Update post on Brazilian Meteor Airburst and comet SWAN25B

Update: 2025, September 9. South Atlantic, 77km off the coast of Brazil in Ceará. Some witnesses reported faint hissing sounds, while others described loud booms comparable to thunder, in one case strong enough to cause ground vibrations.  The event was caught on satellite by NASA. 

Also:

2025, September 13. Mediterranean Sea, between Libya and Sicily, Malta region. Misrata; Misrata District. Fireball. Time: 22:45 UT or 00:45 EET. Duration: 3.5s. Seen in Calabria, Misrata District and Sicilia.

2025, September 10. Mid Pacific Ocean, French Polynesia. Airburst. Time: 11:00:57. Coordinates: (14.8S,142.4W). Altitude: 37.0km. Energy: 2.8e10, -e = 0.098 or 98,000 kg/TNT. Velocity: NA. This is the 26th airburst of 2025.

2025, September 13. (Land-based Event) Argentina, Lihuel Calel Department, La Pampa Province. Airburst. Time: 22:26:39UT. 19:24LT. Coordinates: (38.1S,64.8W). Altitude: 25.1 km. Energy: e = 16.7e10, -e = 0.48 or 480,000 kg/TNT. Velocity: 17.8 km/s. Seen east at Bahía Blanca, Provincia de Buenos Aires (AR), “ It was persistent and incandescent, like it got on fire quickly. The train lasted for a while. It was kind of a whiteish explosion and I saw some fragmentation.” Seen 520km south at Puerto Madryn, Chubut Province (AR) “It exploded very close to the ground, at an extremely fast speed, and the explosion was very very large. It left a huge trail of fire and then the smoke remained as a red cloud for more than 10 minutes.” This is the 27th airburst of 2025.

2025, September 10. USA, North Atlantic. Fireball. Seen in Maine, Massachusetts, New Hampshire and Vermont on Thursday, Travelling SSW on the coast near Casco Bay, Maine. Time: 20:47EDT.

2025, September 13. USA, Well Fleet, Chipman’s Cove. A mass stranding of 7 dolphins. Out of the 12 in the pod, comprising six males and six females, spanning juvenile, subadult, and adult stages, seven ended up stranded, while others stayed afloat in shallow waters. The rescued animals underwent veterinary care, such as intravenous hydration and comfort measures, enroute to their release point near Herring Cove Beach in Provincetown. The next day, five dolphins were spotted again in the Herring River Gut area of Wellfleet. One had passed away before help arrived, but the four surviving ones were transported and freed into deeper waters off Herring Cove Beach.

Observation Topic: The comet SWAN25B was detected approximately 72 hours ago following its perihelion passage, when it became visible in the night sky. Prior to this, it remained undetected because its trajectory brought it into the inner solar system from the Sun-facing, or daylight, side of the sky. Since solar illumination limits terrestrial observations to the night hemisphere at any given time, the comet’s approach was concealed within the Sun’s glare until its recent emergence. It remains uncertain whether this phenomenon is responsible for the recent increase in meteor airbursts; however, ongoing observations over the coming weeks may provide further insight. Additional atmospheric anomalies, including unexplained explosive events, have been reported within the past week, though these so-called 'ghost events' appear to have been excluded from NASA’s official analyses. Either side of October 5th is likely to be eventful. Comet SWAN25B also shows how unprepared we are for these out-of-the-blue objects when they arrive from Earth's blind spots.