M 5.51 in United States on 30 May 2015 11:33 UTC

Hazard models

EQ parameters
Shakemap
Tsunami

Event summary

This earthquake is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

Earthquake Magnitude: 5.5M
Depth: 38.63 Km
Lat/Lon: 39.4690018 , -123.5258331
Event Date: 30 May 2015 11:33 UTC
30 May 2015 04:33 Local
Exposed Population:
158154 people within 100km
Source: NCAL SS
Inserted at: 30 May 2015 11:53 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NCAL SS 0.2 0.2
Scaled population (vector) n.a  
  C1 earthquake n.a  
  C2 earthquake n.a  
  Country Vulnerability n.a  
  INFORM_normalised n.a  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1082614 -0.9 30 May 2015 11:33 4.8M, 87.17km N/A 390 thousand (in 100km) 00:05 NCAL SS
1082615 0 30 May 2015 11:33 4.69M, 38.63km N/A 160 thousand (in 100km) 00:05 NCAL SS
1082620 0.2 30 May 2015 11:33 5.51M, 38.63km 1.4 160 thousand (in 100km) 00:19 NCAL SS
The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.
The episode that has the last updated information.
* The max MMI detected for sources having shakemaps;
** The population detected in MMI>=7 for episode with shakemap or in a 100km radius;
*** The tsunami max height.

Exposed population

The earthquake happened in United States , State of California (population 30,971,320) . The nearest places are Fresno, and Bryson.

Radius Population
100 km 390000 people
75 km 170000 people
50 km 27000 people
20 km <1000 people
10 km <1000 people
5 km no people
2 km no people

Affected Provinces

Region Province Country Population
California United States 31 million people

Affected populated places

Name Region Province Country City class Population Distance
Bryson California United States Village - 15 km
Fresno California United States Major city 430000 people 169 km

see full list

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Tusi Ahp HGT 315 19 km
Rancho San Simeon 98 27 km

Ports

Name LOCODE Country Distance
Estero Bay USESB Wake Island 58 km
Morro Bay USMJK Wake Island 64 km

Dams

Reservoir Dam Name River Year Distance
San Antonio San Antonio River 1965 33 km
Nacimiento Nacimiento River 1957 34 km

More information

For a full list of available products related to this event, please refer to the GDACS Resources page.