PAGER - M 5.8 - TONGA

Alert level does not include impacts from earthquake-related hazards such as tsunamis, landslides, fires or liquefaction.

Earthquake Shaking Alert Level: GREEN

Download Alert PDFWhat's this?Thursday, August 1st, 2013 at 20:01:41 UTC (08:01:41 local)Location: 15.3° S, 173.4° WDepth: 17kmEvent Id: USB000ITMFAlert Version: 4Created: 7 weeks, 5 days after earthquake.
Global Location

Alert Information

Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.
Estimated FatalitiesFatality Alert Level: GREEN
ESTIMATED FATALITY ALERT: GREEN
ESTIMATED FATALITIES (LEVEL)Probability (%)
0 (GREEN)
 
99
1 to 9 (YELLOW)1
10 to 99 (YELLOW)0
100 to 999 (ORANGE)0
1 to 10 thousand (RED)0
10 to 100 thousand (RED)0
100 thousand + (RED)0
Estimated Economic LossesEconomic Alert Level: GREEN
ESTIMATED ECONOMIC ALERT: GREEN
ESTIMATED VALUE IN USD (LEVEL)Probability (%)
0 to 1 million (GREEN)
 
99
1 to 10 million (YELLOW)1
10 to 100 million (YELLOW)0
100 million to 1 billion (ORANGE)0
1 to 10 billion (RED)0
10 to 100 billion (RED)0
100 billion + (RED)0

Detailed Information

Estimated Population Exposed to Earthquake Shaking
Estimated Modified Mercalli IntensityIII-IIIIVVVIVIIVIIIIXX
Est. Population Exposure---*193k*2k000000
Perceived ShakingNot FeltWeakLightModerateStrongVery StrongSevereViolentExtreme
Potential Structure DamageResistantnonenonenoneV. LightLightModerateModerate/HeavyHeavyV. Heavy
VulnerablenonenonenoneLightModerateModerate/HeavyHeavyV. HeavyV. Heavy
*Estimated exposure only includes population within calculated shake map area
Population Exposure
Population per ~1 sq. km. from LandScan
Population Exposure Map

Structure Information Summary

Overall, the population in this region resides in structures that are vulnerable to earthquake shaking, though some resistant structures exist.

Historical Earthquakes (with MMI)

Date (UTC)Dist (km)MagMax MMI (#)Shaking Deaths
2006-09-282126.9IV (220k)0
1977-06-133685.7VII (4k)0
1999-01-053615.9VII (15k)0

Selected Cities Exposedfrom GeoNames Database of Cities with 1,000 or more residents.
MMICityPopulation
IVMalie2k
IIIAfenga2k
IIIFaleula3k
IIIApia40k
IIIVaiusu2k
IIISiusega2k
IIINofoali`i2k
IIILeulumoega1k
IIISolosolo1k
IIISatapuala1k
IIIFasito`outa2k

(k = x1,000)

Historical Events Map
Nearby Events in the EXPO-CAT Earthquake Catalog
#Date/TimeMagLat, Lon, DepthCountryMax MMI (Exposed)DeathsSecondary Effects
ShakingTotal
11975-12-26
15:56 UTC
7.816.24° S, 172.36° W
15km
TOVI (1 k)00
21977-04-02
07:15 UTC
7.316.77° S, 171.94° W
16km
TOV (1 k)00
31977-06-13
10:08 UTC
5.718.55° S, 174.01° W
38km
TOVII (4 k)00
41978-06-17
15:11 UTC
6.917.1° S, 172.17° W
3km
TOV (77)00
51981-09-01
09:29 UTC
7.515.11° S, 173.02° W
17km
TOVI (91)00
61985-06-03
12:06 UTC
6.615.35° S, 173.39° W
46km
TOVI (1 k)00
71987-10-06
04:19 UTC
7.217.98° S, 172.17° W
22km
TOV (13 k)00
81991-01-08
22:04 UTC
6.118.07° S, 173.45° W
34km
TOV (13 k)00
91993-05-16
21:44 UTC
6.615.32° S, 173.22° W
19km
TOV (3 k)00
101995-04-07
22:06 UTC
7.315.34° S, 173.43° W
33km
TOVII (38)00
111999-01-05
08:32 UTC
5.918.5° S, 173.94° W
36km
TOVII (15 k)00
122006-09-28
06:22 UTC
6.916.58° S, 171.99° W
28km
TOIV (220 k)00tsunami
132007-05-29
15:50 UTC
5.518.37° S, 173.89° W
1km
TOV (18 k)00

PAGER content is automatically generated, and only considers losses due to structural damage. Limitations of input data, shaking estimates, and loss models may add uncertainty. PAGER results are generally available within 30 minutes of the earthquake’s occurrence. However, information on the extent of shaking will be uncertain in the minutes and hours following an earthquake and typically improves as additional sensor data and reported intensities are acquired and incorporated into models of the earthquake's source. Users of PAGER estimates should account for uncertainty and always seek the most current PAGER release for any earthquake.