Comparison of the June 12th 2005 Mw 5.2 and October 31 2001 Mw 5.1 Anza, California earthquakes

Last updated: 2018-03-26 (84) 17:50:56 UTC

Global view of quake

 

On Sunday, June 12, 2005 at 8:41 AM (PDT) we recorded an earthquake (Mw 5.2) located near Anza, Southern California.

This web page gathers together diverse sources of information about the event, comparing and contrasting this event with the October 31st, 2001 (Mw 5.1) earthquake that occurred just south–east of the more recent event.

Maps

Map Legend

Map legend

Historical seismicity in Southern California

Orange dots represent earthquakes recorded in the region from 1982 to 2003.

Historical seismicity in Southern California

Event Map: Southern California regional view

Event map, southern California regional view

Event map: local Anza view

Clicking the links below will replace the local Anza view map with the selected map. To return to the original map, click the ”View event map“ hyperlink.

Map Legend

Map legend
Event map, local Anza view

Note: If the station is colored orange, you can click the station to show the waveform recorded from the June 12th, 2005 Mw 5.2 event.

View peak accel image for station RDM View peak accel image for station CRY View peak accel image for station KNW View peak accel image for station WMC View peak accel image for station BZN View peak accel image for station SND View peak accel image for station FRD View peak accel image for station LVA2 View peak accel image for station PFO View peak accel image for station TRO View peak accel image for station YAQ

Station distance & peak accelerations from June 12, 2005 Mw 5.2 event

Station Distance (km) seaz esaz peak-acc-HNZ (mg) peak-acc-HNN (mg) peak-acc-HNE (mg) Acc. waveform image?
SND 3.774 133.68 313.69 -55.216 123.507 -85.433 yes
FRD 4.107 25.20 205.21 52.186 44.260 23.683 yes
BZN 8.769 62.20 242.24 -120.652 245.522 233.103 yes
WMC 9.879 120.71 300.76 140.599 -230.531 294.693 yes
TRO 14.652 272.18 92.09 -130.943 -166.190 284.743 yes
PFO 14.763 231.09 51.02 124.814 -495.668 -244.835 yes
CRY 14.874 106.08 286.16 -74.818 -198.006 99.448 yes
LVA2 19.758 354.14 174.13 -25.344 -25.455 -26.200 yes
KNW 23.865 150.00 330.07 132.422 94.021 90.629 yes
RDM 26.973 114.70 294.84 99.442 203.394 158.953 yes
BVDA2 30.192 318.05 137.93 no
YAQ 45.399 332.15 152.03 18.044 18.370 23.872 yes
SMER 54.945 81.64 261.96 no
HWB 65.823 31.97 212.18 -14.726 21.274 no
MONP 72.15 348.10 168.01 no
MTRP 90.132 29.11 209.37 no
SOL 98.124 38.81 219.17 no
CSLB 144.08 100.73 281.58 no
SCI2 189.48 68.43 249.47 no
Station Distance (km) seaz esaz peak-acc-HNZ (mg) peak-acc-HNN (mg) peak-acc-HNE (mg) Acc. waveform image?

Definitions

Multimedia

Movies

October 31st, 2001 Mw 5.1

 

June 12th, 2005 Mw 5.2

 

3-D interactive models

Magnitude 5.2 Model Screendump

Screen shot of the virtual 3-D model

You may download an interactive 3-D model by right-clicking (Windows) or CTRL-clicking (Mac) the links below and choosing “Download file to disk”. The file has been compressed to 1.7MB with gzip and must be expanded before use. Alternatively you can download the uncompressed scene file (5.6MB). To view the virtual model, you need to download iView 3D - a free viewer available from IVS for Windows, Mac, Linux, Sun and SGI platforms. Click here to download the viewer.

The model consists of an outline of the state of California (white lines), fault systems (brown lines), major highways (purple lines), and high–resolution topography in Southern California. The model and its component parts have been accurately geo-referenced. The Mw 5.2 earthquake of June 12 2005 hypocenter and the Mw 5.1 earthquake of October 31 2001 hypocenter have been plotted as red diamonds. Historical seismicity post 1983 (from the ANZA & NCEDC catalogs) are plotted as small yellow points. Major towns in the region are also plotted.

Once the file has loaded into iView3D, navigation is accomplished by using the mouse. Click the left mouse button and drag left or right to rotate about the vertical axis. Click the left mouse button and drag up or down to rotate about the horizontal axis. Translations and scaling are both accomplished with either the middle or right mouse buttons in a two-step process.

Note to Apple Safari Users

The “Download file to disk” CTRL-click option may download the scene file as a text file (saving the file as a .txt format). If this occurs, or you encounter problems opening the scene file, please try downloading the scene file again, but using a different browser such as Mozilla's Firefox or Camino, or Opera.

Education & Outreach Activities

Publications and Abstracts using data from the October 31st, 2001 Mw 5.1 event

Peer–reviewed publications

Abstracts

Links

Learn more about the Anza group (including who works here, other networks, nuclear tests in China/India/Pakistan).
Learn more about the ANZA network (includes more station information, research, etc).