Bomb had capacity of 50 megatons, after being reduced from 100 megatons capacity. It was detonated from 4km (2.5 miles) above ground from Mityushikha Bay. Mushroom cloud was ~60km (37 miles) in height, and flash was seen from ~1000km (620 miles) of distance. Village 55km (34 miles) from detonation site was "leveled."^[1] Buildings more than 160km (100 miles) away were damaged. Any person within 100km (62 miles) would receive 3rd degree burns. Apparently, it shattered window in Finland at a distance of +800km (500+ miles) away.^[2]

Bomb itself had length of 8m (26ft), diameter of 2m (7ft), and weight of 27t (60k lb).

Distance from San Francisco to Sacramento is ~120km (75 miles). Distance from San Francisco to LA is ~560km (350 miles). If it detonated in San Francisco, buildings in Sacramento would be damaged and people in LA would see the flash.

Sources:

• https://www.britannica.com/topic/Tsar-Bomba
• https://lemielleux.com/how-big-is-tsar-bomba-blast-radius/
• https://www.warhistoryonline.com/guns/10-facts-the-tsar-bomba-the-biggest-bomb-the-world-has-ever-seen.html#:~:text=Shockwave%20from%20the%20bomb%20raced%20around%20the%20world,of%20these%20bombs%20was%20fully%20built%20and%20tested.