According to the Quantum-FFF model, (Function Follows Form) Microscopic Dark Matter (singularity black holes) are proliferated inside stars (sunspots), comets and ball lightning. Recent studies (B. Harris/N. Adams) suggest, that also outside and around earth an equatorial dark matter ring is present as the origin of the “Flyby anomaly” ( B.Harris) or the "growing earth hypothesis".(N.Adams) However a DM equatorial disc located inside the earth (like sunspots) could solve the Flyby anomaly better and perhaps even the growing earth hypothesis and so called P-Wave shadow zone.
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If sunspots (also DM black holes) have the same configuration, then the pioneer anomaly could be also explained.
Secondly the anomalous gravity variations around/ during some total solar eclipses could be explained by a so called lighthouse effect created by two sunspots in line with each other. Such a gravity pencil alike decrease on earth, from the sun could only be observed before and after total eclipse, if the gravity beam is hitting the moon at that moment.
Conclusion, the double gravity dip observed by Q.S.Wang and X.S.Yang in the 1997 solar eclipse, has never been seen again due to this peculiar solar sunspot gravity lighthouse phenomenon.