A massive earthquake trembled Mexico this morning. The tremor continued a few minutes and measured 7.3. Its center was off the coast near Guatemala. The jolt arrived at 11:10am local time. Intense shaking spread fast. Tsunami notifications went up at once. Mexico and Guatemala faced alerts for large waves. Shoreline dwellers moved quickly to elevated ground. Aftershocks persisted, some strong. The biggest aftershock reached 5.0. No major damage or injuries reported yet. Homes and streets stayed quiet in Chiapas and nearby areas. Tsunami alerts stayed up for hours. They were later lowered as seas stayed calm.