Rhyolite caldera complexes are the most explosive of Earth's volcanoes but often don't even look like volcanoes. They are usually so explosive when they erupt that they end up collapsing in on themselves rather than building any tall structure (George Walker has termed such structures inverse volcanoes).
A normal serum sodium level is between 135 and 145 milliequivalents per liter. As this value can vary from laboratory to laboratory, it is important to consult with your physician to get a proper assessment.
Hyponatremia (Definition) Normal sodium range from 135 to 145. Low sodium (hyponatremia) is less than 135. Some may have no symptoms at slight decrease in sodium level especially if the level dropped slowly. Rapid decrease or large drop in levels can cause confusion, seizures, coma and even death. Labs should always be rechecked to exclude false abnormal level.