Balloon pilot reported a cargo aircraft descended through the area of their balloon flight.

Attributes
ACN	1681868
Time
Date	201909
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Balloon
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	None
Flight Plan	VFR
Aircraft 2
Make Model Name	B787 Dreamliner Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	Direct
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Commercial Flight Crew Lighter-Than-Air
Experience	Flight Crew Last 90 Days 75 Flight Crew Total 9000 Flight Crew Type 9000
Events
Anomaly	Conflict Airborne Conflict
Miss Distance	Horizontal 0 Vertical 3500

Narrative:

For months [this cargo airline] has been descending through VFR airspace used by balloons during seasonal operations. The flight path and descending altitude vary greatly. Today the flight path was directly overhead on a VFR descent to ZZZ. As the balloons operate due to fog farther east this spacing gets much closer. We also operate near ZZZ1 and the spacing is closer. We have operated in this limited area [for decades] all most every day. The VFR sectional chart does not indicate [this area of heavy balloon traffic]; yet we have been there [for decades]. Turbine exhaust under the air wave of a large boeing jet at 800 to 1200 feet might collapse a balloon sending up to 18 passenger down.

Original NASA ASRS Text

Title: Balloon pilot reported a Cargo aircraft descended through the area of their balloon flight.

Narrative: For months [this cargo airline] has been descending through VFR airspace used by balloons during seasonal operations. The flight path and descending altitude vary greatly. Today the flight path was directly overhead on a VFR descent to ZZZ. As the balloons operate due to fog farther East this spacing gets much closer. We also operate near ZZZ1 and the spacing is closer. We have operated in this limited area [for decades] all most every day. The VFR Sectional Chart does not indicate [this area of heavy balloon traffic]; yet we have been there [for decades]. Turbine exhaust under the air wave of a large Boeing Jet at 800 to 1200 feet might collapse a balloon sending up to 18 passenger down.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.