>> Japan launched over 9,000 balloon bombs resulting in over 342 incidents registered throughout western United States and Canada. Oregon alone counted 45 balloon incidents.
https://sos.oregon.gov/archives/exhibits/ww2/Pages/threats-bombs.aspx
Neither diagram of balloons nor map where recovered in U.S. would upload here. They are at the links below.
Anatomy of a Balloon Bomb
[A diagram of balloon bomb parts (Image courtesy Canada's Digital Collections)]
Description of balloon bomb parts in diagram:
The balloon: Diameter - 33 1/2 feet; volume - approx. 19,000 cubic feet; material - paraffin treated paper.
Rubber shock cord or bungee.
Sketch of incendiary-type bomb found at Medford, Oregon.
Japanese 15KG antipersonnel bomb found at Thermopolis, Wyoming.
Rope arrangement of skirt section (enlarged).
Battery unit of balloon. Includes: metal poles, bakelite plate, aluminum ring, squib fuse, and aneroid barometer.
Release arrangement.
Fuse housing bolted beneath the center of the cross-beams.
https://sos.oregon.gov/archives/exhibits/ww2/Pages/threats-bombs.aspx
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Map showing balloon recoveries or sighting in North America (courtesy National Geographic
https://sos.oregon.gov/archives/exhibits/ww2/PublishingImages/threats-bombs-map.jpg