Magnetic field fluctuations observed in the heliosheath by Voyager 1 at 114 ± 2 AU during 2010

The radial component of the flow speed VR in the heliosheath was decreasing between 2009.0 (108.5 AU) and 2010.3, at which time it reached the “stagnation region” where VR ≈ 0 km/s from 2010.3 to at least to 2011.0 (115.7 AU). The fluctuations of the hour averages of the magnetic field B observed by Voyager 1 (V1) each day throughout 2010 were primarily compressive (longitudinal) fluctuations, along the T (average B ) direction in HG coordinates. The yearly average of the daily standard deviations (SD) of the compressive component of B was 〈SD c 〉 = 〈SD(BT)〉 ≈ 〈SD(B)〉 ≈ 0.015 nT. The corresponding standard deviations of the transverse components 〈SD t 〉 = SD(BR) > ≈ 〈SD(BN)〉 ≈ 0.006 nT. During 2010, 〈SD c 〉/〈SD t 〉 > 2.6 and 〈SD c 〉/〈B〉 = 0.15. The counting rate of cosmic rays >70 MeV/nuc tends to increase with increasing B and SD c , contrary to expectations.