ISC-EHB (2000-2013) HDF FILE FORMAT
*HDF file read statement
read(1,100)
1 ahyp,isol,iseq,iyr,mon,iday,ihr,min,sec,ad,glat,glon,
2 depth,iscdep,mb,ms,mw,ntot,ntel,ndep,igreg,se,ser,sedep,
3 rstadel,openaz1,openaz2,az1,flen1,az2,flen2,avh,ievt
100 format(a1,a3,a2,i2,2i3,1x,2i3,f6.2,a1,2f8.3,2f6.1,3f4.1,
1 4i4,3f8.2,3f6.1,4i4,f5.1,i10)
Variable definitions:
ahyp secondary teleseismic azimuth gap a1
blank = <= 180 deg
Z = > 180 deg
isol solution type a3
HEQ = origin time & hypocenter fixed
DEQ = depth free (sedep <= 15 km)
FEQ = depth fixed by review
LEQ = depth fixed by program (sedep > 15 km)
XEQ = poor solution (ser > 35 km)
iseq(1:1) a1
M = GCMT solution available
X = explosion
iseq(2:2) a1
d = depth constrained by depth phases
with sedep < 5 km and at least 3
defining depth phases
b = depth set to USGS broadband depth
h = depth set to GCMT depth
g = depth set to ISC-GEM depth provided
there are no other constraints on
depth
o = depth set to 10 km for oceanic events
provided there are no other constraints
on depth
c = depth set to 15 km for events within
known regions of shallow seismicity
provided there are no other constraints
on depth
t = depth set to 15 km for events within
a radius (distance and depth) of 55 km
to a trench provided there are no other
constraints on depth
v = depth set to 15 km for events within
a radius (distance and depth) of 55 km
to a volcano provided there are no other
constraints on depth
s = depth from research studies
i = depth set to ISC depth
x = depth reviewed but uncertain
DEQ x assigned to events with sedep
> 5 and < 15 km
n = depth set to nearest neighbor with a
well constrained depth
z = explosion or earthquake location known
to z km where z is a number from 0-9
iyr year i2
mon month i3
iday day i3
ihr origin hour i4
min origin minute i3
sec origin second f6.2
ad source agency a1
glat geographic latitude f8.3
glon geographic longitude f8.3
depth depth f6.1
iscdep ISC depth f6.1
mb mb magnitude f4.1
ms Ms magnitude f4.1
mw Mw magnitude f4.1
ntot total number of defining observations i4
ntel number of defining teleseismic i4
observations (delta > 28 deg
ndep number of defining depth phase i4
observations (delta > 28 deg)
igreg Flinn-Engdahl region number i4
se standard error of observations used f8.2
ser standard error in position (km) f8.2
sedep standard error in depth (km) f8.2
rstadel distance to closest station f6.1
openaz1 teleseismic azimuth gap f6.1
openaz2 secondary teleseismic azimuth gap f6.1
az1 semi-axis azimuth f4.0
flen1 semi-axis length f4.1
az2 semi-axis azimuth f4.0
flen2 semi-axis length f4.1
multiply product of len1 and len2 by pi
to get area of 90% confidence ellipse
avh statistical geometric mean of axes f5.1
ievt ISC event identification number i10