On Monday morning, Delhi residents experienced a 4.0 magnitude earthquake that not only shook the ground but also left them startled by loud, roaring sounds coming from beneath the earth. The tremor, which originated just 5 kilometers below the surface near Dhoulakuan in South Delhi, has sparked widespread discussions about the unusual phenomenon and the science behind it.
The Earthquake’s Epicenter
The National Center for Seismology (NCS) confirmed that the earthquake’s epicenter was located beneath the grounds of the Durgabai Deshmukh College of Special Education in Dhoulakuan. The shallow depth of the epicenter—only 5 kilometers below the surface—amplified the intensity of the shaking, making it feel much stronger than its measured magnitude.
The Roaring Sounds: What Caused Them?
One of the most alarming aspects of the earthquake was the loud, rumbling sounds that many residents reported hearing. According to experts, such sounds are not uncommon during shallow earthquakes. The United States Geological Survey (USGS) explains that when the ground shakes, it generates small seismic waves. When these waves interact with the air above the ground, they can produce sound waves.
The first waves generated during an earthquake, known as P-waves, are similar to sound waves. If the earthquake’s epicenter is shallow, these waves can travel to the surface and create audible rumbling or roaring sounds. In Delhi’s case, the hard soil likely amplified these sounds, making them more pronounced.
Why Did a 4.0 Magnitude Quake Feel So Intense?
Despite its moderate magnitude, the earthquake felt much stronger to Delhi residents due to its shallow depth. Experts suggest that the closer the epicenter is to the surface, the more energy is transmitted to the ground above, resulting in more intense shaking. This explains why many residents described the tremor as feeling like a much higher magnitude quake.
Social Media Buzz
The earthquake and the accompanying sounds left residents in a state of panic, with many taking to social media to share their experiences. One user tweeted, “This was a 4.0? It felt much stronger to us. Does being on a higher floor make the shaking worse?” Another user humorously wrote, “For the first time, I woke up without an alarm clock!”
PM Modi Urges Calm
Prime Minister Narendra Modi addressed the situation on social media, urging residents to remain calm and vigilant. He tweeted, “Earthquake tremors have been felt in Delhi and nearby areas. I urge everyone to stay calm. Be prepared for possible aftershocks and stay alert. Authorities are closely monitoring the situation.”
Historical Context
The Dhoulakuan area, known for its proximity to a lake, has experienced minor earthquakes every two to three years. The last significant tremor in the region occurred in 2015, measuring 3.3 on the Richter scale. The recurrence of seismic activity in this area highlights the need for increased awareness and preparedness among residents.
The 4.0 magnitude earthquake in Delhi, though moderate, left a lasting impact due to its shallow depth and the accompanying roaring sounds. As experts continue to study the phenomenon, the incident serves as a reminder of the unpredictable nature of seismic activity and the importance of being prepared for future events.