Rating
Tonga risk rating
Expired, last assessment only · Model activity-rating-2
Computed: 2026-10-05 17:16:51 UTC · Valid until: 2026-10-05 19:16:51 UTC
Coverage is selective. Missing or expired assessments do not mean zero hazard. Scores are heuristic indices, not calibrated probabilities. Model cards and limits
- state:
- partial
- missing Country:
- unassessed
- country Limit:
- 100
- forecast:
- assessed
- population Metric:
- urban event exposures not unique people
This is a last assessment, not a current rating. Its validity has expired or was not recorded. That does not establish that no events or hazards are present.
The rating is a composite index of reported activity; it does not measure structural vulnerability or coping capacity. It shares inputs with the Calamity Forecast Index. Neither index is a calibrated event probability. Model cards and formulas.
Rating components
Recorded hazard contributions
Mean event index: 16/100 · Eligible records: 1
Rating history
- BtoAindex 21 → 1772d agoCountry rating changed from B to A (score 21 → 17)Disaster — South Of Tonga Islands (CalamityScore 16)
EVENT: Disaster — South Of Tonga Islands — TO Detected: 2026-07-27T21:12:12.000Z CalamityScore: 16/100 Severity: low HISTORICAL CONTEXT: Location: TO region. RECOMMENDED ACTIONS: Standard river level monitoring. No cascade risks detected for this event.
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 23 → 972d agoCountry rating changed from B to A (score 23 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 22 → 972d agoCountry rating changed from B to A (score 22 → 9)M 5.1 Earthquake (CalamityScore 10)
- BtoAindex 22 → 972d agoCountry rating changed from B to A (score 22 → 9)M 5.1 Earthquake (CalamityScore 17)