Reuters: The threat from a deadly volcano that hastened the departure of U.S. President Barack Obama from Indonesia on Wednesday would not be downgraded as it is still rumbling, authorities said. Mount Merapi, in the heart of densely populated Java island, begun spewing lava and hot clouds and volcanic gas more than two weeks ago, killing 151 people and forcing 320,000 people to abandon their homes. “Although the eruptions are less frequent, that doesn’t mean that the activities have slowed, so we are…