Global Seismic Activity: Moderate Earthquake Levels Recorded on March 18, 2026

A moderate level of global seismic activity was recorded on Wednesday, March 18, 2026, with a total of 553 earthquakes reported across the globe, according to the EarthquakeMonitor. This includes three earthquakes registering a magnitude of 5.0 or higher, 47 quakes between magnitudes 4.0 and 4.9, and 160 earthquakes with magnitudes between 3.0 and 3.9.

Earthquake Summary – March 18, 2026

• Magnitude 5.0+: 3 earthquakes
• Magnitude 4.0+: 47 earthquakes
• Magnitude 3.0+: 160 earthquakes
• Magnitude 2.0+: 343 earthquakes
• Total Earthquakes (Magnitude 2.0+): 553

The total seismic energy released during the 24-hour period was estimated at 3.1 x 10¹³ joules, equivalent to 8.62 gigawatt-hours, 7418 tons of TNT, or 0.5 atomic bombs. This energy is comparable to that released by a single magnitude 5.8 earthquake.

Top 10 Earthquakes (Past 24 Hours)

1. Magnitude 5.4: Indian Ocean, Mauritius (March 18, 2026, 04:10 pm GMT +5)
2. Magnitude 5.0: 61 km southwest of Puerto Barrios, Guatemala (March 18, 2026, 11:35 am Guatemala time)
3. Magnitude 5.0: South Atlantic Ocean, 313 km southeast of Georgetown, Ascension, Saint Helena (March 17, 2026, 06:53 pm GMT -1)
4. Magnitude 4.9: Bering Sea, 27 mi southeast of Buldir Island, Alaska (March 17, 2026, 06:36 pm GMT -10)
5. Magnitude 4.9: Indian Ocean, Mauritius (March 18, 2026, 05:11 pm GMT +5)
6. Magnitude 4.9: Coral Sea, 52 km north of Espiritu Santo Island, Vanuatu (March 18, 2026, 10:27 am Efate time)
7. Magnitude 4.9: South Atlantic Ocean, Saint Helena (March 17, 2026, 06:53 pm GMT -1)
8. Magnitude 4.8: North Pacific Ocean, 198 km east of Hachijo Jima Island, Japan (March 18, 2026, 07:08 pm GMT +9)
9. Magnitude 4.8: Indian Ocean, Mauritius (March 18, 2026, 07:51 pm GMT +5)
10. Magnitude 4.8: Indian Ocean, Mauritius (March 18, 2026, 04:29 pm GMT +5)

Regional Seismic Activity

Earthquakes were reported in various regions, including the Indian Ocean (Mauritius), Guatemala, the South Atlantic Ocean, the Bering Sea, Vanuatu, and Japan. Several smaller earthquakes were too felt in the Alboran Sea (Spain), Morocco, France, the Philippines, Panama, Costa Rica, Bulgaria, and Indonesia.

Real-time earthquake tracking and seismic risk assessment are available through resources like Earthquake Radar and the USGS Latest Earthquakes map.