The theory was that the energy bursts from the Sun was triggering earthquakes..
Even this is not accurate. SSGEOS demonstrated this with statistical observations to conclude that solar flares do not cause earthquakes. Take, for example, the M8.8 earthquake in Russia.
M 8.8 - 2025 Kamchatka Peninsula, Russia Earthquake
2025-07-29 23:24:52 (UTC)
52.498°N 160.264°E. 35.0 km depth
USGS earthquake alert
According to data from Spaceweatherlive, solar activity remained at low levels on the day before and on the day of the M8.8 earthquake. ( here is the data
July 28 &
July 29)
●On July 28, the maximum solar flare registered C1.5 from solar region 4153.
●On July 29, the maximum solar flare registered C3.1 from solar region 4155.
At that time, AR4153 and AR4155, along with others, were facing the Earth, but none had a magnetic field strong enough to generate the danger of an M-class or X-class flare.
SpaceWeather
So where did the burst of solar energy come from to generate an M8.8 earthquake? From a solar wind stream coming from a coronal hole? No. According to
SpaceWeather on July 28 & July 29
There are no significant coronal holes facing Earth. Credit: NASA/SDO
We would have to go back to July 24 to see something interesting happening, as the Earth was in a solar wind stream from a coronal hole, but this commonly occurs without a significant seismic activity reflection on Earth.
The geomagnetic field has been at unsettled to active levels for the past 24 hours. Solar wind speed reached a peak of 818 km/s at 24/0738Z. Total IMF reached 7 nT at 23/2128Z.
SpaceWeatherlive
Let's take the example of the M6.0 earthquake in Afghanistan.
M 6.0 - 27 km ENE of Jalālābād, Afghanistan
2025-08-31 19:17:34 (UTC)
34.519°N 70.734°E. 8.0 km depth
USGS earthquake alert
On August 30, region 4199 produced an M2.7-class solar flare at 20:02 UTC with an associated CME.
The "impact" occurred on September 1st at 21:00 UTC
CME IMPACT SPARKS WIDESPREAD AURORAS: As predicted, a CME struck Earth's magnetic field on Sept. 1st (2100 UTC). The impact was abrupt and strong, bringing solar winds faster than 600 km/s (1.3 million mph), and a G2-class geomagnetic storm.
SpaceWeather
Strongest earthquakes from September 1 to 3
● M 5.0 - 130 km SE of Old Harbor, Alaska
2025-09-01 11:02:10 (UTC)
56.279°N 151.984°W. 18.5 km depth
USGS earthquake alert
● M 5.3 - Izu Islands, Japan region
2025-09-02 03:32:31 (UTC)
30.634°N 140.171°E. 10.0 km depth
USGS earthquake alert
● M 5.3 - 15 km SSW of Puyo, Ecuador
2025-09-03 14:56:44 (UTC)
1.606°S 78.070°W. 163.3 km depth
USGS earthquake alert
Solar wind flowing from a southern coronal hole could graze Earth on Sept. 6-9.
So, can an M-class flare produce an M6+ earthquake, but a C-class flare produce an M8+ earthquake, if we only take into account "solar energy burst" close to significant seismic events? I don't think so.