PAGER - M 6.1 - SOUTH ISLAND OF NEW ZEALAND

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

Earthquake Shaking Alert Level: RED

Download Alert PDFWhat's this?Monday, February 21st, 2011 at 23:51:43 UTC (11:51:43 local)Location: 43.6° S, 172.7° EDepth: 5kmEvent Id: USB0001IGMAlert Version: 8Created: 5 weeks, 3 days after earthquake.
Global Location

Alert Information

Red alert level for economic losses. Extensive damage is probable and the disaster is likely widespread. Estimated economic losses are 10-70% GDP of New Zealand. Past events with this alert level have required a national or international level response. Yellow alert level for shaking-related fatalities. Some casualties are possible.
Estimated FatalitiesFatality Alert Level: YELLOW
ESTIMATED FATALITY ALERT: YELLOW
ESTIMATED FATALITIES (LEVEL)Probability (%)
0 (GREEN)
 
2
1 to 9 (YELLOW)
 
79
10 to 99 (YELLOW)
 
19
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: RED
ESTIMATED ECONOMIC ALERT: RED
ESTIMATED VALUE IN USD (LEVEL)Probability (%)
0 to 1 million (GREEN)0
1 to 10 million (YELLOW)0
10 to 100 million (YELLOW)1
100 million to 1 billion (ORANGE)
 
6
1 to 10 billion (RED)
 
23
10 to 100 billion (RED)
 
36
100 billion + (RED)
 
25

Detailed Information

Estimated Population Exposed to Earthquake Shaking
Estimated Modified Mercalli IntensityIII-IIIIVVVIVIIVIIIIXX
Est. Population Exposure---*23*33k*103k51k64k228k92k0
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 highly resistant to earthquake shaking, though some vulnerable structures exist. The predominant vulnerable building types are reinforced masonry and concrete/cinder block masonry construction.

Historical Earthquakes (with MMI)

Date (UTC)Dist (km)MagMax MMI (#)Shaking Deaths
1984-06-241646.1VIII (18)0
1990-02-101436VIII (61)0
1994-06-191005.9VIII (12)0

Selected Cities Exposedfrom GeoNames Database of Cities with 1,000 or more residents.
MMICityPopulation
IXChristchurch364k
VIILincoln2k
VIWoodend3k
VIRolleston3k
VIBurnham1k
VILeeston1k
VIOxford2k
VDarfield2k
IVTimaru28k
IVGreymouth9k
IVHokitika3k

(k = x1,000)

Historical Events Map
Nearby Events in the EXPO-CAT Earthquake Catalog
#Date/TimeMagLat, Lon, DepthCountryMax MMI (Exposed)DeathsSecondary Effects
ShakingTotal
11977-01-18
05:41 UTC
6.141.75° S, 174.38° E
41km
NZVI (57 k)00
21984-06-24
13:29 UTC
6.143.6° S, 170.67° E
9km
NZVIII (18)00
31990-02-10
03:27 UTC
642.31° S, 172.84° E
1km
NZVIII (61)00
41990-02-10
03:54 UTC
5.742.39° S, 172.81° E
15km
NZVIII (6)00
51991-01-28
12:58 UTC
5.741.97° S, 171.77° E
27km
NZVI (8 k)00
61991-01-28
18:00 UTC
5.841.97° S, 171.77° E
18km
NZVI (6 k)00
71994-06-18
03:25 UTC
6.743.12° S, 171.65° E
11km
NZVII (33)00
81994-06-19
13:43 UTC
5.943.17° S, 171.63° E
7km
NZVIII (12)00
91995-11-24
06:18 UTC
6.142.99° S, 171.84° E
4km
NZVII (71)00
102001-12-07
19:27 UTC
5.844.2° S, 168.84° E
35km
NZVII (476)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.