Summary of flashes and marks since 2009 (intensity rating Joules / 10^14) all system III coords :    Click HERE for one possible simulation of flashes since 2009

Explusion Mark -- July 19, 2009:  Enormous black mark "Wesley mark" spotted (the actual internal event to cause this occurs only ~16 hours earlier)  -57, 305

With this "Wesley mark" there was verified silica ejection, this forced them to change a theory they did not want to change concerning asteroids hitting Jupiter (Jupiter was to have cleared out all asteroids millions of years ago). Also, the Wesley mark did not produce an "impact halo" (compression waves, "eyebrows", etc.). 

Our theory says the silica sourced from Jupiter's core! (no asteroids needed!)

--1. June 3, 2010 (8):  1st verified flash (antipodal to "2")  -16.5, 159

"The flash occurred close to Jupiter's limb in the equatorial region, at longitude 159°W (system III) and planetographic latitude 16.5°S."

"Gemini-N/NIRI and Keck/NIRC2 surveyed reflected sunlight in strong CH4 absorption bands in the 1.5–2.3 μm region but observed no evidence for high-altitude debris. VLT/VISIR, Gemini-S/T-ReCS, and IRTF/TEXES searched for thermal perturbations and particular chemistry in the impact site (7–25 μm) but saw no signatures of (1) excess thermal energy, (2) ammonia gas dredged from the troposphere by the rising fireball, or (3) stratospheric silicate debris."

http://iopscience.iop.org/article/10.1088/2041-8205/721/2/L129/meta

In short, they assumed "impact" from the start and went that direction.  They tried to claim the light signature was consistent with the impact theory but no other light theory has been tested or compared.  Furthermore, no heat signature or debris what-so-ever has been spotted with any of the flashes.  This is a problem for them since it constrains the objects to about 10 meters yet produces, somehow, a tremendous light outburst for 2 seconds that is easily imaged from Earth.  They used SL-9's (Shoemaker-Levy-9 comet) smallest detectable fragment to come up with a size model.  Since larger than 10m chunks were creating debris and heat in the SL-9 event, 10m was chosen as the likely max. diameter of these new and strange "impacts".

--2. August 20, 2010 (7):  2nd verified flash (antipodal to "1")  +17, 337 

http://alpo-j.asahikawa-med.ac.jp/kk10/j100820r.htm  "I personally measured the position of the flash roughly as (140 (sys II),+17) including error of +- a few degrees."  Dr.Junichi Watanabe   (latitude cross-verified below). 

As such this location is a near-antipode to the previous flash in June!  Of course, this implies an electrical internal source.

There has been a suggestion that this flash was as far as 21.5 north but this cannot be. This flash was clearly at the edge of the NEB -- therefore it cannot be farther north than +18 degrees latitude as explained below: 

"The visible surface of Jupiter is divided into several bands parallel to the equator. There are two types of bands: lightly colored zones and relatively dark belts.The wider Equatorial Zone (EZ) extends between latitudes of approximately 7°S to 7°N. Above and below the EZ, the North and South Equatorial belts (NEB and SEB) extend to 18°N and 18°S, respectively."  http://www.lpl.arizona.edu/~showman/publications/ingersolletal-2004.pdf   Article about dynamics of Jupiter

https://en.wikipedia.org/wiki/Atmosphere_of_Jupiter  Wiki article about belts and zones

https://en.wikipedia.org/wiki/Atmosphere_of_Jupiter#/media/File:Jupiter_Belt_System.svg  Jupiter belt description

http://zetta.jpn.ph/alpo/kk10/j100820g1.jpg  Flash image showing the event at the northern edge of the NEB

http://www.planetary.org/blogs/emily-lakdawalla/2010/2633.html  Article with two more observer's videos showing location at edge of NEB

--3. September 10, 2012 (13):  3rd verified flash and was most massive flash seen to date on Jupiter -- +2, 264 

"The flash location has been refined to Long= 345 deg, Lat = +2 deg in system I." (+2, 264 for sys III) http://cosmicdiary.org/fmarchis/2012/09/11/some-news-from-the-september-2012-jupiter-flash/

https://www.flickr.com/photos/19299984@N08/7976507568/

--4. March 17, 2016 (15 est.): 4th verified flash, most massive yet, viewed on limb of Jupiter rising high above the surface -- +12.4, 297.4

http://www.universetoday.com/128147/jupiter-smacked-comet-asteroid/