Description:

The SCEDC is now archiving and distributing large, continuous time-windows of high sample-rate data (H__ and E__ channels) for a few hours before and after significant
events in Southern California.

In standard data-collection mode, the SCSN broadband instruments (B__, V__ and
L__ channels) are recorded continuously and the higher sample-rate short-period instruments of the network are only recorded in triggered mode. i.e., data for the
H__ and E__ channels are recorded for a few seconds before the origin time to a few minutes after the event.

The general guidelines for significant-event snapshot data collection are:

5.0 <= Mx<= 5.5		6 hours before the event and 6 hours after
5.5 <= Mx<= 6.0		6 hours before the event and 12 hours after
6.0 <= Mx		12 hours before the event and 24 hours after

Access:

These data are considered part of the continuous archive, rather than the triggered archive. To check on the availability of data for a particular event, use the 'avail' command in STP. For example, for the 2003/02/22,12:19:00 Big Bear event, use:

STP> avail -l -chan HH_ 2003/02/22,06:00:00 +18h

to determine what records are available for 6 hours before the event to 12 hours after.

To retrieve the data, use the 'WIN' command in STP:

STP> win -chan HH_ 2003/02/22,06:00:00 +18h (or any sub-portion of time).

Events Available:

Currently, we have continuous snapshots available for the following events:

0.7 mi S of Obsidian Butte, CA	evid: 14179736	Mag = 5.1
Origin date/time:	2005/09/02	01:27:19
lat/long	33.1598	-115.6370
0.8 mi SSE of Obsidian Butte, CA	evid: 14178184	Mag = 4.6
Origin date/time:	2005/08/31	22:47:45
lat/long	33.1648	-115.6357
channels/time available:	HH_, HL_, EH_	Continuous archive from 2005/08/31,00:00:00 to 2005/09/06,00:00:00

5.6 mi ESE of Anza, CA	evid: 14151344	Mag = 5.2
Origin date/time:	2005/06/12	15:41:46
lat/long	33.5288	-116.5727
2.1 mi NE of Yucaipa, CA	evid: 14155260	Mag = 4.9
Origin date/time:	2005/06/16	20:53:2
lat/long	34.058	-117.0113
channels/time available:	HH_, HL_, EH_	Continuous archive from 2005/06/12,12:00:00 to 2005/06/18,00:00:00

13.4 mi W of Wheeler Ridge	evid: 14138080	Mag = 5.2
Origin date/time:	2005/04/16	19:18:13
lat/long	35.0272	-119.1783
channels/time available:	HH_, HL_	-6h, +12h

Fontana Swarm	evid: 14116972	Mag = 4.4
Origin date/time:	2005/01/06	14:35:28
lat/long	34.1250	-117.4387
channels/time available:	HH_, HL_, EH_	-2.5h, +21.5h

stations archived:

All stations within 50km radius of origin

Sumatra-Andaman Island Earthquake	evid: 10069653	Mw = 9.0
Origin date/time:	2004/12/26	00:58:50
lat/long	3.307	95.947
channels/time available:	HH_, EH_	-0.5h, +5.5h

2004 Parkfield Earthquake	evid: NC.51147892	Mag = 6.0
Origin date/time:	2004/09/28	17:15:24
lat/long	35.815	-120.374
channels/time available:	HH_, HL_, EH_, EL	-6h, +12h

Adobe Hills Swarm (east of Mono Lake)	evid: NC.51146343	Mag = 5.5
Origin date/time:	2004/09/18	23:02:17
lat/long	38.009	-118.679
channels/time available:	HH_, HL_, EH_, EL	-6h, +12h

stations archived:

All stations within 500km radius of origin

Offshore: 42 mi SE of San Clemente Island, CA	evid: 14065544	Mag = 5.3
Origin date/time:	2004/06/15	22:28:48
lat/long	32.3287	-117.9175
channels/time available:	HH_, HL_, EH_, EL	-3.5h, +3.5h

Wheeler Ridge, CA	evid: 9983429	Mag = 4.3
Origin date/time:	2004/02/14	12:43:11
lat/long	35.0378	-119.1312
channels/time available:	HH_, EH_	-2h, +22h

San Simeon, CA	evid: 9966449	Mag = 6.5
Origin date/time:	2003/12/22	19:15:56
lat/long	35.7085	-121.1043
channels/time available:	HH_, HL_, EH_, EL_	-6h, +12h

Hokkaido, Japan	evid: 13993864	Mag = 8.3
Origin date/time:	2003/09/25	19:50:08
lat/long	41.8150	143.9100
channels/time available:	EH_, EL_	-12h, +12h

Big Bear	evid: 13935988	Mag = 5.4
Origin date/time:	2003/02/22	12:19:10
lat/long	34.3098	-116.8480
channels available:	HH_, HL_, EH_, EL_	-6h, +12h

Yorba Linda	evid: 9818433	Mag = 4.8
Origin date/time:	2002/09/03	07:08:51
lat/long	33.9173	-117.7758
channels available:	HH_, HL_	-6h, +24h