Earthquake with magnitude of Md 3.3 on date 23-09-1987 and time 01:34:14 (Italy) in region 2 km NW Cittareale (RI)

A magnitude Md 3.3 earthquake occured in region: 2 km NW Cittareale (RI), on

  • 22-09-1987 23:34:14 (UTC)
  • 23-09-1987 01:34:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.626, 13.144 at 5 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Cittareale RI 2 482 482
Accumoli RI 12 667 1149
Posta RI 12 694 1843
Amatrice RI 12 2657 4500
Borbona RI 13 617 5117
Montereale AQ 14 2581 7698
Cascia PG 15 3217 10915
Monteleone di Spoleto PG 16 599 11514
Leonessa RI 16 2435 13949
Capitignano AQ 17 665 14614
Norcia PG 19 4957 19571
Cagnano Amiterno AQ 20 1369 20940
Poggiodomo PG 20 117 21057

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km NW of L'Aquila (69753 inhabitants)
41 Km E of Terni (111501 inhabitants)
46 Km W of Teramo (54892 inhabitants)
51 Km SE of Foligno (57155 inhabitants)
78 Km NE of Guidonia Montecelio (88673 inhabitants)
79 Km NE of Tivoli (56533 inhabitants)
82 Km SE of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
88 Km E of Viterbo (67173 inhabitants)
89 Km W of Chieti (51815 inhabitants)
90 Km W of Pescara (121014 inhabitants)
98 Km NE of Roma (2864731 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
Md 3.3
ML-VAX 2.6
1987-09-22
23:34:14
42.626 13.144 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 55909
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-09-22 23:34:14 ± 0.156
Latitude 42.6260 ± 0.0103
Longitude 13.1440 ± 0.0203
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 55909

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 2018.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 38
Number of associated phases, regardless of their use for origin computation 66
Number of defining phases 66
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.9
Epicentral distance of station closest to the epicenter (degree) 0.00291
Epicentral distance of station farthest from the epicenter (degree) 0.0544
Number of stations at which the event was observed 48
Number of stations from which data was used for origin computation 48
Magnitudes information

Md:3.3

Field Value
Value 3.3
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 55909
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:53:45

ML:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 5
Type of magnitude ML
Reference to an origin 55909
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CAV.Z. 1987-09-22T23:35:58.50 10.0 undecidable manual SN 342 0.0346 0.91 0.4
--.RNI.Z. 1987-09-22T23:35:57.40 10.0 undecidable manual SN 333 0.0342 1.13 0.4
--.PAN.Z. 1987-09-22T23:35:54.00 10.0 undecidable manual SN 339 0.0329 0.97 0.4
--.TRI.N. 1987-09-22T23:35:54.90 10.0 undecidable manual SG
--.CEY.E. 1987-09-22T23:35:45.10 10.0 undecidable manual SN 16 0.0291 2.06 0.1
--.KBN.Z. 1987-09-22T23:35:44.50 10.0 undecidable manual PN 106 0.0544 0.63 0.9
--.VBY.Z. 1987-09-22T23:35:42.00 10.0 undecidable manual SN 27 0.0292 -1.23 0.4
--.TRI.E. 1987-09-22T23:35:40.00 10.0 undecidable manual SN 8 0.028 0.08 0.6
--.PHP.Z. 1987-09-22T23:35:37.90 10.0 undecidable manual PN 97 0.0493 1.7 0.3
--.BCI.Z. 1987-09-22T23:35:32.80 10.0 undecidable manual PN 90 0.0459 1.8 0.3
--.TIR.Z. 1987-09-22T23:35:31.20 10.0 undecidable manual PN 102 0.0463 -0.41 1.1
--.SDA.Z. 1987-09-22T23:35:27.50 10.0 undecidable manual PN 95 0.0426 1.62 0.4
--.BDI.Z. 1987-09-22T23:35:21.79 10.0 undecidable manual SN 308 0.021 0.18 0.7
--.ZOU.Z. 1987-09-22T23:35:16.70 10.0 undecidable manual PN 358 0.0354 1.84 0.4
--.MDI.Z. 1987-09-22T23:35:16.00 10.0 undecidable manual PN 323 0.0359 0.24 1.4
--.FVI.Z. 1987-09-22T23:35:15.50 10.0 undecidable manual PN 356 0.0357 0.05 1.4
--.CAV.Z. 1987-09-22T23:35:14.80 10.0 undecidable manual PN 342 0.0346 0.96 1
--.RNI.Z. 1987-09-22T23:35:13.70 10.0 undecidable manual PN 333 0.0342 0.63 1.2
--.RBL.Z. 1987-09-22T23:35:13.50 10.0 undecidable manual PN 4 0.0344 0.09 1.4
--.PAN.Z. 1987-09-22T23:35:12.30 10.0 undecidable manual PN 339 0.0329 1.09 0.9
--.BOO.Z. 1987-09-22T23:35:12.00 10.0 undecidable manual PN 359 0.0332 0.41 1.3
--.MPR.Z. 1987-09-22T23:35:11.50 10.0 undecidable manual PN 358 0.0325 0.97 1
--.BUA.Z. 1987-09-22T23:35:10.30 10.0 undecidable manual PN 359 0.0323 0.11 1.5
--.BAD.Z. 1987-09-22T23:35:10.10 10.0 undecidable manual PN 1 0.0325 -0.35 1.4
--.CTI.Z. 1987-09-22T23:35:10.50 10.0 undecidable manual PN 343 0.0322 0.41 1.4
--.RCL.Z. 1987-09-22T23:35:10.00 10.0 undecidable manual PN 354 0.0319 0.38 1.4
--.VOY.Z. 1987-09-22T23:35:09.20 10.0 undecidable manual PN 8 0.031 1 1
--.DRE.Z. 1987-09-22T23:35:09.00 10.0 undecidable manual PN 5 0.0321 -0.81 1.2
--.BRT.Z. 1987-09-22T23:35:08.50 10.0 undecidable manual PN 119 0.0311 0.09 1.5
--.CEY.Z. 1987-09-22T23:35:07.30 10.0 undecidable manual PN 16 0.0291 1.86 0.4
--.VBY.Z. 1987-09-22T23:35:06.10 10.0 undecidable manual PN 27 0.0292 0.55 1.4
--.TRI.Z. 1987-09-22T23:35:03.30 10.0 undecidable manual PN 8 0.028 -0.34 1.6
--.HVA.Z. 1987-09-22T23:34:55.30 10.0 negative manual PN 76 0.0223 0.34 3.4
--.SGO.Z. 1987-09-22T23:34:55.50 10.0 undecidable manual PN 141 0.0236 -1.41 0.8
--.TR9.Z. 1987-09-22T23:34:54.00 10.0 undecidable manual PN? 134 0.0199 2.7 0
--.BDI.Z. 1987-09-22T23:34:53.50 10.0 undecidable manual PN 308 0.021 0.44 1.7
--.MS1.Z. 1987-09-22T23:34:53.00 10.0 undecidable manual PN 113 0.0204 0.97 1.2
--.PII.Z. 1987-09-22T23:34:51.00 10.0 undecidable manual PN 300 0.0198 -0.12 1.8
--.SDI.Z. 1987-09-22T23:34:49.87 10.0 undecidable manual SG 151 0.0093 -0.46 0.7
--.AM8.Z. 1987-09-22T23:34:48.75 10.0 undecidable manual SG 19 0.0088 0.33 1
--.ARV.Z. 1987-09-22T23:34:45.54 10.0 undecidable manual SG 350 0.0079 0.2 0.7
--.FG2.Z. 1987-09-22T23:34:44.59 10.0 undecidable manual PN 118 0.0153 0.31 1.8
--.SGG.Z. 1987-09-22T23:34:43.50 10.0 undecidable manual PN 143 0.0138 1.45 0.8
--.MSC.Z. 1987-09-22T23:34:43.60 10.0 undecidable manual PN 156 0.014 1.29 1
--.CP9.Z. 1987-09-22T23:34:42.13 10.0 undecidable manual SG 190 0.007 0.27 0.7
--.SS9.Z. 1987-09-22T23:34:42.92 10.0 undecidable manual PN 324 0.0143 0.05 1.8
--.MAO.Z. 1987-09-22T23:34:40.78 10.0 undecidable manual PN 262 0.0133 -0.45 1.6
--.MC8.Z. 1987-09-22T23:34:40.49 10.0 undecidable manual SG 16 0.0062 1.19 0.6
--.DUI.Z. 1987-09-22T23:34:39.00 10.0 undecidable manual PN 134 0.0123 -0.73 1.5
--.SDI.Z. 1987-09-22T23:34:35.00 10.0 undecidable manual PG 151 0.0093 0 1.8
--.CM8.Z. 1987-09-22T23:34:34.39 10.0 undecidable manual SG 0 0.0051 -0.8 0.9
--.ASS.Z. 1987-09-22T23:34:33.34 10.0 undecidable manual SG 320 0.005 -1.76 0.2
--.AM8.Z. 1987-09-22T23:34:32.14 10.0 negative manual PG 19 0.0088 -1.76 1.3
--.RMP.Z. 1987-09-22T23:34:32.49 10.0 undecidable manual PG 202 0.0079 0.51 1.7
--.ARV.Z. 1987-09-22T23:34:30.77 10.0 undecidable manual PG 350 0.0079 -1.34 0.9
--.MNS.Z. 1987-09-22T23:34:29.38 10.0 undecidable manual SG 235 0.0037 -0.87 0.4
--.CP9.Z. 1987-09-22T23:34:29.31 10.0 undecidable manual PG 190 0.007 -0.8 1.3
--.MC8.Z. 1987-09-22T23:34:27.58 10.0 undecidable manual PG 16 0.0062 -1.05 1.3
--.ASS.Z. 1987-09-22T23:34:25.14 10.0 undecidable manual PG 320 0.005 -1.07 1.1
--.CM8.Z. 1987-09-22T23:34:24.32 10.0 undecidable manual PG 0 0.0051 -1.94 0.9
--.AQU.Z. 1987-09-22T23:34:24.88 10.0 undecidable manual SG 145 0.0029 -2.06 0.1
--.PRG.Z. 1987-09-22T23:34:24.00 10.0 undecidable manual PG! 311 0.0065 -5.16 0
--.ALP.Z. 1987-09-22T23:34:24.90 10.0 undecidable manual SG 63 0.0031 -2.63 0.1
--.MNS.Z. 1987-09-22T23:34:22.28 10.0 undecidable manual PG 235 0.0037 -1.13 0.9
--.AQU.Z. 1987-09-22T23:34:19.74 10.0 undecidable manual PG 145 0.0029 -1.76 0.6
--.ALP.Z. 1987-09-22T23:34:19.97 10.0 positive manual PG 63 0.0031 -1.87 1.2
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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