Earthquake & Volcano Monitor — 2026-05-20
A magnitude 5.9 earthquake struck near Naha, Okinawa, Japan today, marking the most significant seismic event of the past 24 hours. On the volcanic front, Kīlauea's Halemaʻumaʻu eruption remains paused following episode 47, while global volcanic activity including Fuego, Klyuchevskoy, Popocatépetl, and Semeru remained active as of May 18. The worldwide earthquake report for May 18 confirms continued seismic activity across multiple regions.
Earthquake & Volcano Monitor — 2026-05-20
Seismic Activity
M5.9 — Near Naha, Okinawa, Japan (May 20, 2026)
The most notable seismic event in our coverage window struck near Naha, Okinawa, Japan today at 11:46 am local time (GMT+9). The strong magnitude 5.9 quake was centered 10.7 km north of China, Kagoshima-ken.
World Earthquake Report — May 18, 2026
VolcanoDiscovery's worldwide earthquake report for Monday, May 18, documented seismic activity across multiple regions. A weak M2.3 quake was recorded in the Aegean Sea, 28 km north of Crete Island, Greece, at 03:18 am GMT+3.
Global Context
According to PlainQuake, 2026 has recorded 2,972 total M4+ events so far, with 32 significant M6+ earthquakes and a maximum magnitude of 7.5 for the year.
Volcanic Watch
Kīlauea (Hawaiʻi) — YELLOW/ADVISORY
As of May 18, 2026 at 18:20 UTC, the U.S. Geological Survey reports the Halemaʻumaʻu eruption of Kīlauea is paused. Vent glow and crater floor incandescence continue following lava fountaining episode 47. The current alert level remains YELLOW/ADVISORY and aviation color code is YELLOW.
Global Volcanic Activity — May 18, 2026
VolcanoDiscovery's worldwide volcanic activity report for May 18 highlights active eruptions or elevated unrest at multiple volcanoes, including Fuego (Guatemala), Klyuchevskoy (Russia), Popocatépetl (Mexico), Semeru (Indonesia), and Sheveluch (Russia/Kamchatka).
Sabancaya (Peru) — Active Plume
Volcano News for May 18 recorded a 1,700-meter plume over Sabancaya, along with a 45×36 km ash cloud detected by satellite over Sheveluch (Kamchatka), and reports of decreasing volcanic quake frequency at Maekan over recent days.
Great Sitkin (Alaska) — Ongoing Monitoring
The Alaska Volcano Observatory continues monitoring Great Sitkin and other Alaskan volcanoes. No new explosions have been reported at Great Sitkin since May 2021.
Earth Science
No peer-reviewed research findings published within the past 24 hours were identified in our research results for this section. For the latest volcanic and seismic science, visit the USGS Volcano Hazards Program and VolcanoDiscovery for ongoing updates.
⚠️ Earthquake and volcano data can change rapidly. Always verify critical safety information directly with official sources such as and local emergency management agencies.
This content was collected, curated, and summarized entirely by AI — including how and what to gather. It may contain inaccuracies. Crew does not guarantee the accuracy of any information presented here. Always verify facts on your own before acting on them. Crew assumes no legal liability for any consequences arising from reliance on this content.
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