The August 26, 2003 earthquake
M5.0near Volcano, Hawaii
A magnitude 5.0 earthquake 5.6 miles deep, centred in Hawaii County. The 84th strongest in Hawaii’s record since 1900, and the strongest within 50 miles since a magnitude 5.0 on April 1, 2000. 2 aftershocks of magnitude 2.5 or more followed within 30 days.
The earthquake
- Magnitude
- 5.0
- duration magnitude (md)
- Depth
- 5.6 mi
- 9.1 km below the surface
- Local time
- Tuesday, August 26, 2003
- 20:24 HST; 06:24 UTC on Aug 27, 2003
- In Hawaii’s record
- 84th
- strongest of 39,637 since 1900
USGS ANSS Comprehensive Earthquake Catalog, event hv5309745 (“13 km SSE of Volcano, Hawaii”). The USGS event page carries the ShakeMap, felt reports and the official summary.
Aftershocks
Earthquakes of magnitude 2.5 or more within 20 miles of the epicentre in the 30 days after.
2
Aftershocks in 30 days
3.2
Largest aftershock, Sep 10, 2003
0
On the first day
0
In the 7 days before
- The search radius is the surface rupture length expected for an earthquake of this magnitude (Wells and Coppersmith, 1994), at least 20 and at most 600 miles, so a great earthquake's sequence is counted along its whole fault.
Counties and cities within 50 miles
Distance from the epicentre to each county boundary (zero when inside) and to each city centre.
Counties
- Hawaii CountyHI · inside
Earthquakes around the epicentre
7,002 earthquakes of magnitude 3 or more within 50 miles of this epicentre since 1973.
Earlier earthquakes of magnitude 5 or more within 50 miles, strongest first
- November 29, 1975M7.7
- November 16, 1983M6.7
- September 20, 1908M6.7
- March 28, 1915M6.4
- August 21, 1951M6.3
- June 25, 1989M6.2
- November 1, 1918M6.2
- April 26, 1973M6.2
- May 3, 1905M6.2
- June 27, 1962M6.2
USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.