You may not think earthquakes and volcanoes can go together, but they are unlikely friends, creating sensations under the earth’s surface. Most earthquakes occur because of the movement of tectonic plates previously described. Sometimes earthquakes happen below a volcano. This happens because magma, which is hot molten rock beneath the earth’s surface, pushes on rock until it breaks the rock and seeps into it. Then, the magma builds more pressure until it leaks more magma into the crack. Little earthquakes happen each time the rock breaks and lets in more magma. These little earthquakes are too small to feel. They are called harmonic tremors, perhaps because of their constant release of energy, like one long song played underground. What does the underlined analogy mean in this paragraph?

Westridge, ohio — more than 600 transportation employees went on strike at midnight last night after the westridge city council rejected their demand for a 10% pay increase. the strike affects all bus and rail services throughout westridge and the neighboring communities of turlock, smithfield, and lowell grove. "we hoped we would not be forced to strike, but until our demands are met, we really have no choice," said wanda thompson, a representative of the transportation employees union. "we simply don't get paid what we deserve." members of the westridge city council see the situation differently. "our employees already earn 6% more than the state average for similar transportation jobs," said raoul cobian, president of the westridge city council. hopefully the two groups can come to an agreement soon and bring this unnecessary strike to an end. what is the common name for the underlined information in the article?