Infrasound and seismic detections associated with the 7 September 2015 Bangkok fireball

Abstract

A bright fireball was reported at 01:43:35 UTC on September 7, 2015 at a height of ∼30 km above 14.5 • N, 98.9 • E near Bangkok, Thailand. It had a TNT yield equivalent of 3.9 kilotons (kt), making it the largest fireball detected in SouthEast Asia since the ∼50 kt 2009 Sumatra bolide. Infrasonic signals were observed at four infrasound arrays that are part of the International Monitoring System (IMS) and one infrasound array located in Singapore. Acoustic bearings and event origin times inferred from array processing are consistent with the eyewitness accounts. A seismic signal associated with this event was also likely recorded at station SRDT, in Thailand. An acoustic energy equivalent of 1.15 ± 0.24 kt is derived from the Singaporean acoustic data using the period of the peak energy.

Automated detection and cataloging of global explosive volcanism using the International Monitoring System infrasound network

“…Figure gives a preliminary impression for how volcanic eruption detectability will improve by completing the IMS network and also reveals the volcanic regions (e.g., the Caribbean, Southeast Asia, and Aleutians) that would most benefit from additional regional infrasound arrays. Additional infrasound arrays deployed in regions with dense volcanism [e.g., Guilbert et al , ; Matoza et al , ; Garces et al , ; Matoza et al , ; De Angelis et al , ; Tailpied et al , ; Caudron et al , ] have not been considered in this study. Including such data in future work would likely lead to significant improvements by augmenting the network density and decreasing the acoustic source power of explosive eruption detectable with a globally integrated network [ Le Pichon et al , ; Green and Bowers , ].…”

A meteor shockwave event recorded at seismic and infrasound stations in northern Taiwan

“…Taking a bulk density of 3 g/cm 3 and an initial velocity of 20 km/s for the meteor in question, this kinetic energy nominally means a pre-atmospheric mass of ~250 kg and a size of ~0.5 m across. Only moderate in (3) log 10 E 2 = 3.34 log 10 (P) − 2.58, E 2 ≤ 100 kT size compared to previously studied events (Brown et al 2002;Le Pichon et al 2013;Caudron et al 2016), such meteors impinge upon the Earth at the rate of a few tens every year (Silber et al 2009). We should note that our estimation of the pre-atmospheric source energy is rather crude and utterly contingent upon the uncertainty in the measurement of periods at the variable recording sites.…”

The Chant Meteor Procession of 1913 – Towards a Descriptive Model

“…In addition to advanced ground-based instrumentation being available in the modern era, the ability of space-based detectors to track fragments as they move through the atmosphere [32] will additionally enhance the likelihood of finding meteoritic material on the ground [36]. Likewise, the coupling of meteoroid generated shock waves to the ground could potentially make for seismic, sonic boom, electrophonic sound, VLF radio and electronic interference data becoming available for analysis [13,37,38,39]. On the historical basis that distinctive procession events occur at intervals of order 100 years, it is to be hoped that the next meteor procession will take place in the near future.…”