If seasons depended on distance from the Sun, both hemispheres would have summer at the same time. In fact, Earth passes closest to the Sun in early January, in the middle of northern winter, and farthest in early July, a difference of about 3%. What creates the seasons is the tilt of Earth's axis, about 23.4°, which changes the angle and length of daylight.
On 27 August 1883, the eruption of the Indonesian volcano Krakatoa was heard as far away as Rodrigues Island, nearly 4,800 km away. Its pressure wave was picked up by barometers worldwide and circled the globe several times. The tsunamis that followed killed more than 36,000 people.
The deepest known point in the ocean, Challenger Deep, lies roughly 10,900 m below the Pacific surface. Drop Everest in and its summit would still sit about 2 km underwater. Down there, the pressure is more than 1,000 times what you feel at sea level, roughly a tonne pressing on every square centimetre.