More speculation of the capabilities of ionospheric heating over at GDS
Which brings us to today's high octane speculation. Some of the capabilities of these heaters have been outlined ever since Dr. Nick Begich and Jeane Manning published their book Angels Don't Play this HAARP back in the 1990s, which made the technology a focus of attention, at least, within the alternative research field. One of the possibilities for the technology that they outlined was the use of the technology to stimulate waves under the surface the earth. This led to some speculation (mostly coming from Brazil!) that such technologies might be used to stimulate, create, or alternatively, amplify or damp, earthquakes. There's a hint of this in the article:
High-energy microwaves can pluck the electromagnetic field in ionosphere like fingers playing a harp. This can produce very low-frequency radio signals that can penetrate the ground or water – sometimes to depths of more than 100 metres (328 feet) in the ocean, which made it a possible communication method for submarines.
(Of course, note one of the signs of such an earthquake: its shallow nature.)
17-second earthquakes?
https://gizadeathstar.com/2018/12/russia-china-and-those-ionospheric-heaters-and-other-stuff-part-one/