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Saint John's, Antigua and Barbuda

17.1185, -61.8449  ·  updated 05 Sep 2026, 04:05 UTC  ·  composite signal 68.1/100
68.1Composite /100
MODERATETsunami Risk
11Air Quality
57kmNearest Volcano
0Wildfire Hotspots
8.5UV Index
0.0Kp Index
9Quakes 7d
Seismic activity map for Saint John's, Antigua and Barbuda

7-day weather outlook — conditions across the region

7-day weather forecast map for Saint John's, Antigua and Barbuda

7-day forecast — temperature, precipitation & wind

7-day wind & rain chance

Global baseline

Signal — Current Conditions

27.6°C

Drizzle · feels 31.4°C · humidity 81%

Signal — Wind

14.7 km/h

Gusts to 25.9 km/h · direction 96°

Signal — Pressure & Sun

1015 hPa

Sunrise 05:54 · Sunset 18:17

Signal — Sky & Visibility

70% cloud

Visibility 6.3 km · dew point 23.9°C

Signal — Earthquake

81.2 / 100

733 events considered (30yr, 300km radius)

Nearest M5.5+: 61 km ESE of Codrington, Antigua and Barbuda (68.1 km, M6)

Signal — Flood / Terrain

55 / 100

Elevation 0 m · slope 3.0°

Signal — Economic Impact

$1,847 / yr expected

Based on country average estimate property value ($194,400)

Signal — Wildfire (24h)

0 hotspots

None detected within ~55km

Signal — Air Quality

11 AQI

Dominant pollutant: pm10 · St De Baie Mahault, Guadeloupe, France

Signal — UV Index

8.5 (Very High)

Today's peak UV, Open-Meteo

Signal — Tsunami Risk

MODERATE

Based on largest nearby earthquake magnitude (30yr history)

Signal — Nearest Volcano

57 km

Soufriere Hills (Stratovolcano) · last erupted 2013

9,401 people live within 10km of Soufriere Hills · 448,929 within 100km
Tectonic setting: Subduction zone / Oceanic crust (< 15 km)

The complex, dominantly andesitic Soufrière Hills volcano occupies the southern half of the island of Montserrat. The summit area consists primarily of a series of lava domes emplaced along an ESE-trending zone. The volcano is flanked by Pleistocene complexes to the north and south. English's Crater, a 1-km-wide crater breached widely to the east by edifice collapse, was formed about 2000 years ag…

Full Smithsonian GVP profile →

Nearest other major location: Plymouth, Montserrat (60 km)

Next 24 hours — hourly detail

Next 24 hours — pressure & humidity

Seismic activity analysis (30-day, 500km)

30-Day Event Count

66

2.2/day · Above normal activity (z=11.31)

Last 7 Days

9 events

14% of this month's activity happened this week

Largest Event

M4.1

Avg M3.16 · min M2.07 · σ 0.44

Energy Released

131 t TNT

Cumulative seismic energy, 30 days (Gutenberg-Richter)

Depth Profile

31.5 km avg

18.2% shallow (<10km) · range 3.1–135 km

Underwriting Signal

74.8/100

Recommended tier: Premium

95% Confidence Range

50.1–81.9

Statistically expected event count for this window

Projected: 803.0 events/yr · 0.8% chance of M5+ within 1 year · 0.4% chance of M6+ within 5 years · 0.1% chance of M7+ within 10 years

Same statistical model as your Risk Evidence Report (USGS FDSN, 30-day/500km window)

Recent significant earthquakes (30yr, 300km)
M7.4 — 18 km WNW of Basse-Pointe, Martinique 249 km, 156 km deep
M6.5 — 164 km E of Beauséjour, Guadeloupe 252 km, 9 km deep
M6.3 — 20 km SSW of Petites Anses, Guadeloupe 161 km, 14 km deep
M6.1 — 40 km WSW of Pointe-Noire, Guadeloupe 114 km, 162 km deep
M6 — 61 km ESE of Codrington, Antigua and Barbuda 68 km, 47 km deep
M6 — 126 km ENE of Codrington, Antigua and Barbuda 156 km, 26 km deep

USGS FDSN

Space weather (planetary signal)

Signal — Solar Wind

349 km/s (Calm)

Magnetic field: 4.6 nT (Quiet)

Signal — Geomagnetic (Kp)

0.0 / 9

Quiet — planetary K-index

Signal — Solar Flare

B4.6

Current GOES X-ray flux class

Solar wind speed and magnetic field strength indicate current space weather activity. Elevated or storm-level readings can disrupt satellites, GPS accuracy, and power grids. This is a planetary-scale signal, not specific to this location — typical quiet conditions run under 400 km/s wind speed and under 5 nT magnetic field.

Source: NOAA SWPC (planetary signal, same for every location)

Sources: USGS (earthquakes), Open-Elevation (terrain), Open-Meteo (weather). Illustrative estimate, not a certified engineering or actuarial assessment.

No country-specific deep dive built yet for Antigua and Barbuda. Global baseline data above still reflects real, live USGS and elevation data for this exact coordinate.

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