Venezuela has been shaken by two significant earthquakes, the first registering a magnitude of 7.2 followed by another just 39 seconds later at 7.5. Experts highlight that despite the small difference in magnitude, the second quake was approximately three times more powerful due to the logarithmic nature of the Richter scale.
Adam Pascale, a seismologist with the Australian Seismological Research Institute, stated, “A 7.5 earthquake might not seem significantly greater than a 7.2, but in reality, it is around twice as strong in terms of energy released.” The United States Geological Survey (USGS) corroborates these findings and has detailed explanations of varying earthquake magnitudes on its website.
Reports indicate that the death toll in Venezuela has reached at least 164, with nearly 1,000 people injured and over 10,000 reported missing. The interim president, Delcy Rodríguez, announced that rescue teams are being mobilized from other regions to La Guaira, the area hardest hit, located north of Caracas. “Dozens of buildings have collapsed there, and we are currently conducting intensive rescue operations to save lives,” Rodríguez stated.
Magnitude Comparison: Why 7.5 is Considerably Stronger
The second earthquake was determined to be 2.8 times stronger than the first, based on energy release. Energy is critical in determining the structural damage caused by earthquakes, as noted by the USGS. For context, a magnitude 8.7 earthquake releases approximately 23,000 times more energy than a 5.8 quake. This variance explains why larger earthquakes can be significantly more destructive than smaller ones.
While the amplitude values are easier to comprehend and are frequently reported, it is the energy that causes the actual damage. Historical context shows that the 1977 Romanian earthquake measured 7.4, indicating that the current Venezuelan quake at 7.5 was 1.25 times larger and 1.4 times more powerful.
The last major earthquake to hit Venezuela occurred on October 29, 1900, with a magnitude of 7.7 in Caracas. Since then, five earthquakes measuring over 7 have been recorded in northern Venezuela or near its coast.
