Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics.he destruction of oceanic crust occurs at subduction zones where oceanic crust is forced under either continental crust or oceanic crust. Today, the Atlantic basin is actively spreading at the Mid-Atlantic Ridge. Only a small portion of the oceanic crust produced in the Atlantic is subducted.
April sees the weather continue to improve in Krakow, Poland, as the average temperature doubles to 8 C. The average high is 12Â°C and the average low 3Â°C, so April is the first month of the year that does not reach freezing temperatures.t is, along with May, the least humid month of the year at 70%, and there are 11 hours of sunshine per day? making it one of the sunniest months of the year. April hosts the Easter celebrations, and these include religious ceremonies and parades, along with various events being held around the Wawel Cathedral.
Find the best month to visit Krakow based on the weather. Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec. Expect 14Â°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Krakow in April. Check more long-term weather averages for Krakow in April before you book your next holiday to Poland in 2018. 1  Krakow weather overview. 2  Krakow monthly weather. 3  Krakow 5-day forecast. 4  Poland holidays. 5  Poland destinations. 6  Poland map. 7  More destinations.