NCEER Catalog
The NCEER-91 (National Center for Earthquake Engineering Research) Catalog for the Eastern United States, (Armbruster and Seeber, 1992) is one of the most carefully researched historical catalogs for the central and eastern U.S. and contains events from 1627 through the beginning of 1985.
If you requested a search on one of the nine magnitude types,
the output will look something like this:
DATE O.T. (UTC) LAT LONG DEP MAG MT MMI FA MAIN EQID
1980/ 7/25 6:22:34.00 45.140 -74.170 5 3.1 1 0.0 * 6639
1980/ 7/27 18:52:21.40 38.190 -83.890 16 5.2 1 VII 12.0 MAIN 6642
1980/ 7/31 9:27: 2.30 38.190 -83.930 19 2.5 1 IV 0.0 6642 6650
DATE: Date of earthquake (YYYY/MM/DD)
O.T.: Origin Time of earthquake (UTC)
LAT: Latitude
LON: Longitude
DEP: Depth (km) [0 if undetermined]
MAG: Magnitude (of the type you selected)
MT: Magnitude Type: This refers only to NCEER magnitudes, and
denotes how the magnitude was determined:
1 = Instrumental, 2 = Felt Area, 3 = Maximum Intensity
MMI: Epicentral Intensity, MMI scale (rounded up
to nearest integer)
FA: Natural Log of Felt Area in km [0 = undetermined]
MAIN: "MAIN" if event is a main shock, "*" if event is isolated.
Otherwise, the EQID of the parent event is given.
EQID: Earthquake Identification Number
If FULL OUTPUT was specified, the search results are listed in the
original format:
COLUMN
NUMBERS FORMAT TERM DESCRIPTION
3 7 I5 UNID Unique Identification for each entry
8 12 I5 EQID Earthquake Identification Number
13 16 I4 YEAR Year (origin time in UTC)
17 18 I2 MONTH Month
19 20 I2 DAY Day
21 22 I2 HOUR Hour
23 24 I2 MIN Minute
25 29 F5.2 SEC Second
30 34 F5.2 LAT Latitude, Degrees North
35 40 F6.2 LON Longitude, Degrees West
41 42 I2 DEPTH Depth, km
44 46 F3.1 MB Body wave magnitude (Nuttli)
47 49 F3.1 MBLG LG wave magnitude (Nuttli)
50 52 F3.1 ML Local magnitude
53 55 F3.1 MS 20 second surface wave magnitude
56 58 F3.1 M Magnitude, type unknown
59 61 F3.1 MC Coda duration magnitude
62 64 F3.1 MN Nuttli magnitude
66 66 A1 ITM Intensity to magnitude conversion code
67 71 F5.1 LNFA Felt Area (natural log of km**2)
72 72 A1 UI Intensity uncertainty
73 77 F5.1 INT Epicentral Intensity (MMI)
79 79 A1 UM Uncertainty in magnitude and method
of estimation
80 80 A1 UL Uncertainty in location
81 81 I1 REG EPRI TEC region
83 83 I1 GD Global Default
87 89 A3 SRC Data source code
91 95 F5.2 MB* Uniform magnitude for b-value calculation
96 100 F5.2 MBEST Best estimate magnitude
101 105 F5.2 MBVAR Variance of mb
108 111 A4 IDMAIN EQID of main shock
114 122 A9 ENTR Entry Tacking: TEC #, DD MM YY
124 124 I1 MT Type of NCEER magnitude:
1 - Instrumental; 2 = Felt Area;
3 = Maximum Intensity
125 128 F4.1 MAG NCEER magnitude
For more details see "NCEER-91 Earthquake Catalog for the United States"
by J. Armbruster and L. Seeber, published by National Center for Earthquake
Engineering Research, SUNY Buffalo, 1992.
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