en.wikipedia.org/wiki/Solar_neutrino

The official Super-Kamiokande site says the detector is located at 1,000 meters underground in the Kamioka Mine. Other official Super-K materials use the same figure and distinguish it from 2,700 meters water equivalent (m.w.e.), which is a shielding/overburden measure rather than the physical depth. So the article is conflating underground depth with water-equivalent overburden.

The Borexino collaboration’s own website describes Borexino in the past tense: it “was a particle physics experiment” and says the last DAQ run stopped on Oct 7, 2021. That means the detector is not currently active in the sense claimed here, even though papers continued to be published afterward using previously collected data.

John Bahcall’s NobelPrize.org account explicitly says the Kamiokande water detector was sensitive to high-energy neutrinos from boron-8 (8B) and that the original Davis chlorine experiment was primarily, though not exclusively, sensitive to the same high-energy neutrinos. Raymond Davis’s Nobel lecture says even more directly that “It is these 8B neutrinos that produce most of the solar neutrino signal I detected”, with only some contribution from pep and 7Be neutrinos. So describing Homestake as most sensitive to 7Be is backwards.

After SNO and Super-Kamiokande, the solar neutrino problem was resolved: the total number of solar neutrinos reaching Earth is consistent with solar-model predictions. What was missing was specifically the expected number of electron neutrinos, because many transform into muon and tau neutrinos on the way to Earth. NobelPrize.org summarizes the resolution clearly: the total number of neutrinos of all types agrees with the solar model, while electron neutrinos constitute about a third of the total number. So stating that the number of neutrinos detected on Earth is still lower than predicted by a factor of one-third is incorrect unless it is explicitly limited to electron neutrinos in the historical context.

This sentence gets both the duration and the event rate wrong. The Sanford Underground Research Facility’s history page dates the Davis experiment from 1967 to 1994, not merely “several years.” Nobel and historical sources also describe the signal as only a few argon atoms per month, not a few per day. The Nobel Foundation’s 2002 background document gives the final average production as 0.48 ± 0.03 (stat.) ± 0.03 (syst.) argon atoms per day, and notes that argon extraction was done about once every two months. So the article overstates the daily conversion rate by several-fold and understates how long the experiment ran.