Posted on April 17, 2022 (Updated on July 9, 2025)
When was the last time Seattle had an earthquake?
Regional SpecificsThe 2001 Nisqually earthquake occurred at 10:54:32 local time on February 28, 2001 and lasted nearly a minute.…2001 Nisqually earthquake. A stretch of Washington State Route 302 near Allyn, Washington, damaged after the earthquake Olympia Seattle Local time 10:54:32 a.m. Magnitude 6.8 Mw Depth 57 km (35 mi) When was the last major earthquake in
Posted on April 17, 2022 (Updated on July 9, 2025)
What does amplitude mean in earthquakes?
Regional SpecificsThe amplitude is the size of the wiggles on an earthquake recording. How does amplitude affect earthquakes? The magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs. Adjustments are included in the magnitude formula to compensate for the variation in the distance between the various seismographs and
Posted on April 17, 2022 (Updated on July 9, 2025)
What is stoping in mining?
Regional Specificsstoping, in mining engineering, the opening of large underground rooms, or stopes, by the excavation of ore. Stoping is practiced in underground mineral mining when the surrounding rock is strong enough to permit the drilling, blasting, and removal of ore without caving. What is shrinkage stoping in mining? GENERAL DESCRIPTION Shrinkage or shrinkage stoping refers
Posted on April 17, 2022 (Updated on July 9, 2025)
What can be found in clastic rocks?
Regional SpecificsMineral composition of clastic reservoirs, in order of abundance are: quartz, clay minerals, rock fragments, feldspars, chert, mica, and carbonate fragment. A “clean” sandstone will comprise mainly quartz grains. What features can be found in clastic rocks? Clastic sedimentary rocks are named according to the characteristics of clasts (rock and mineral fragments) that comprise them.
Posted on April 17, 2022 (Updated on July 9, 2025)
What causes stalactites and stalagmites to form?
Regional SpecificsStalactites and stalagmites form when rainwater drips through limestone rock. Along the way, it picks up carbon dioxide, from the air and from any organic matter it passes as it dribbles down, according to the National Park Service. The carbon dioxide reacts with the water to make a weak acid called carbonic acid. How are
Posted on April 17, 2022 (Updated on July 9, 2025)
What is the shallowest part of the ocean?
Regional Specificscontinental shelfcontinental shelf. This is the shallowest part of the ocean bed. What is the shallowest part of the ocean called? What is the shallowest part of the ocean floor? Answer: The continental shelf is that shallow part of the ocean floor that begins at the shoreline and gently slopes underwater to an average depth