Back in April of 2021, there was an opening on 144 MHz between Hawaii and California, a distance of approximately 4074 kms.
Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az Mode
2021-04-24 11:00 KH6HME/B 144.277007 -31 0 BK29go 20 N3IZN/2 DM13ji 4074
2021-04-24 10:58 KH6HME/B 144.277007 -31 0 BK29go 20 N3IZN/2 DM13ji 4074
2021-04-24 10:56 KH6HME/B 144.277008 -29 0 BK29go 20 N3IZN/2 DM13ji 4074
2021-04-24 10:48 KH6HME/B 144.277008 -31 0 BK29go 20 N3IZN/2 DM13ji 4074
2021-04-24 10:46 KH6HME/B 144.277008 -29 0 BK29go 20 N3IZN/2 DM13ji 4074
Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az Mode
2021-04-24 11:00 KH6HME/B 144.277007 -31 0 BK29go 20 N3IZN/2 DM13ji 4074
2021-04-24 10:58 KH6HME/B 144.277007 -31 0 BK29go 20 N3IZN/2 DM13ji 4074
2021-04-24 10:56 KH6HME/B 144.277008 -29 0 BK29go 20 N3IZN/2 DM13ji 4074
2021-04-24 10:48 KH6HME/B 144.277008 -31 0 BK29go 20 N3IZN/2 DM13ji 4074
2021-04-24 10:46 KH6HME/B 144.277008 -29 0 BK29go 20 N3IZN/2 DM13ji 4074
The reports shown above are from Chris Arnold, N3IZN in California who heard the WPSR transmissions on 144 MHz from the KH6HME beacon on a mountain in Hawaii.
The tropo duct across the eastern Pacific usually opens up several times a year and allow signals from 144 MHz to the microwave bands to propagate through it. It's probably one of the best long distance VHF paths in the world.