Ahyi Seamount — ADVISORY Alert
NMI Ahyi Seamount YELLOW/ADVISORY - No marine plumes observed in satellite data this week.
Geographic Context
This volcano event occurred at coordinates 20.44°, 145.03°.
Event Assessment
This event is Ahyi Seamount volcano showing alert level ADVISORY, being monitored by volcanological observatories for changes in eruptive behavior. Calamity.live has classified it as "medium" severity with a severity value of 50. The computed Calamity Score is 20 out of 100, suggesting contained impact at this time. The primary scoring components are: historical (80), intensity (30). Data for this event was sourced from usgs_volcano, one of the 250 scientific monitoring sources aggregated by Calamity.live.
Regional Monitoring Context
This volcano event is being tracked through Calamity.live's global monitoring network, which aggregates data from 250 scientific sources. Real-time monitoring and multi-source verification help ensure data accuracy and timely reporting of significant natural hazard events worldwide.
Event Data
| Type | Volcano |
| Severity | medium |
| Severity Value | 50 |
| Calamity Score | 20 / 100 |
| Confidence | 62% |
| Coordinates | 20.4370, 145.0300 |
| Nearest City | Saipan (586 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-23T21:43:58.000Z |
| Source | https://volcanoes.usgs.gov/hans2/view/notice/DOI-USGS-NMI-2026-07-23T23:41:13+00:00 |
Score Breakdown
Technical Details
| VolcanoName | Ahyi Seamount |
| VolcanoId | 284141 |
| AlertLevel | ADVISORY |
| ColorCode | YELLOW |
| ObservatoryCode | nmi |
| NvewsThreat | Very Low Threat |
| PreviousAlertLevel | UNASSIGNED |
| PreviousColorCode | UNASSIGNED |
Safety Information
During volcanic activity: follow evacuation orders from authorities. Volcanic ash can damage lungs — wear N95 masks or wet cloth over nose and mouth. Stay indoors during ashfall, close windows, and avoid driving. Lahars and pyroclastic flows can travel at high speeds — stay away from valleys and river channels near the volcano.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a volcano event with CalamityScore 20/100, near Saipan, based on data from usgs_volcano. Source: Calamity.live, a platform aggregating real-time data from 197 scientific monitoring sources.