UMUN - Mt. Umunhum near Los Gatos, CA, USA

We operate broadband and borehole stations under the network code BK. The Berkeley Digital Seismic Network (BDSN) is a regional network of very broadband and strong motion seismic stations designed to monitor regional seismic activity as well as provide high quality data. The Berkeley borehole stations have borehole geophones or other seismic sensors and may have other geophysical instrumentation.

BARD is our GPS network for monitoring crustal deformation across the Pacific-North America plate boundary and in the San Francisco Bay Area for earthquake hazard reduction studies and rapid earthquake emergency response assessment

Load California Faults

Station Name	UMUN (MOUM)
In Operation	2023/12/06 00:00:00 - Present
Latitude
Longitude:
Elevation:	996.08 meters
Instrumentation	Broadband GPS

Site

Location

Site is located at Mount Umunhum

Network

Berkeley Digital Seismic Network (BK)
Bay Area Regional Deformation Network Network (BARD)

Geology

Marine sedimentary and metasedimentary rocks

Borehole Conditions

The SHWD installation is based on the USArray vault design.

GPS Monument Description

Deep-Drilled Braced

Plots & Figures

Seismic Station Pictures

GPS Station Daily Timeseries

Last year	Clean	Clean & detrended	Raw	Raw & detrended
Lifetime	Clean	Clean & detrended	Raw	Raw & detrended
Text file (final results only)	Clean		Raw

GPS Station Pictures

MOUM

Instrumentation

Table of Seismic Instrumentation

	Sensor	Datalogger	SEED Channels	Location
Broadband	CASCADIA COMPACT	CENTAUR	BH?,HH?,LH?	00
Accelerometer	CASCADIA COMPACT	CENTAUR	HN?,LN?	00

GPS Instrumentation

	Receiver	Antenna	Radome	-
GPS	SEPTENTRIO POLARX5	SEPTENTRIO SEPCHOKE_B3E6	SPKE	-

Data & Metadata

Waveforms and associated metadata, and GPS data, are available at the Northern California Earthquake Data Center (NCEDC).

Waveform Data

BK Information Directory, including
- List of station locations
- List of available channels
  - Year/month/day format
  - Year,doy format
- Instrument Response
  - SEED format
  - Simplified Responses

Querying the archives
- SeismiQuery at the NCEDC
Download waveform data

GPS Data

Site log: moum.log

Data Type From To

Low-rate raw --- ---

Low-rate rinex 04/11/2024 present

High-rate raw 04/11/2024 present

High-rate rinex 04/11/2024 present

Data Type	From	To
Low-rate raw	---	---
Low-rate rinex	04/11/2024	present
High-rate raw	04/11/2024	present
High-rate rinex	04/11/2024	present

Data Quality

Noise Analysis

View more noise plots

GPS Data Quality

Completeness

Data completeness is defined both as "Completeness of observations" and "Cycle slips per observation". "Completeness of Obs." is the number of epochs in the final RINEX file normalized to the expected number. This percentage will go down if time is missing from the RINEX file. "Cycle slips per Obs." is the total number of detected cycle slip normalized to the total number of observations in the RINEX file. This number will increase as the receiver loses lock on satellites more frequently.

Previous Year

Lifetime

Multipath

The effects of multipath on the data are estimated by parameters for L1 and L2 (MP1 and MP2 respectively); see Estey and Meertens (GPS Solutions, 1999) for derivation. The daily value is the RMS of MP1 and MP2 throughout the day and for all satellites. Higher values indicate a greater prevalence and/or strength of multipathing, i.e. objects on the ground are providing multiple reflection pathways from the satellite to antenna.

Previous Year

Lifetime