Earthquake with magnitude of Md 2.7 on date 18-09-1989 and time 17:21:11 (Italy) in region 6 km W Cittareale (RI)

A magnitude Md 2.7 earthquake occured in region: 6 km W Cittareale (RI), on

  • 18-09-1989 15:21:11 (UTC)
  • 18-09-1989 17:21:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.61, 13.09 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 6 482 482
Posta RI 9 694 1176
Borbona RI 11 617 1793
Leonessa RI 11 2435 4228
Monteleone di Spoleto PG 12 599 4827
Cascia PG 14 3217 8044
Montereale AQ 16 2581 10625
Accumoli RI 16 667 11292
Amatrice RI 17 2657 13949
Poggiodomo PG 17 117 14066
Micigliano RI 18 127 14193
Capitignano AQ 20 665 14858
Cagnano Amiterno AQ 20 1369 16227

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Terni (111501 inhabitants)
38 Km NW of L'Aquila (69753 inhabitants)
50 Km SE of Foligno (57155 inhabitants)
51 Km W of Teramo (54892 inhabitants)
74 Km NE of Guidonia Montecelio (88673 inhabitants)
75 Km NE of Tivoli (56533 inhabitants)
80 Km SE of Perugia (166134 inhabitants)
83 Km E of Viterbo (67173 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
93 Km W of Chieti (51815 inhabitants)
94 Km W of Pescara (121014 inhabitants)
94 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
Rev 1000 Md 2.7
ML-VAX 2.0
1989-09-18
15:21:11
42.61 13.09 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 99659
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-09-18 15:21:11 ± 0.129
Latitude 42.61 ± 0.01
Longitude 13.09 ± 0.01
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 99659

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) 1223.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00332
Epicentral distance of station farthest from the epicenter (degree) 0.00907
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

Md:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 99659
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:33:05

ML:2

Field Value
Value 2
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 99659
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
--.AM8.Z. 1989-09-18T15:21:49.10 10.0 undecidable manual SG! 21 0.0091 2.61 0
--.ARV.Z. 1989-09-18T15:21:43.20 10.0 undecidable manual SG 352 0.008 0.39 0.5
--.CP9.Z. 1989-09-18T15:21:38.22 10.0 undecidable manual SG 187 0.0067 0.09 0.7
--.AZI.Z. 1989-09-18T15:21:35.61 10.0 undecidable manual SG 157 0.006 0.09 0.7
--.CM8.Z. 1989-09-18T15:21:32.80 10.0 undecidable manual SG 3 0.0053 -0.09 1
--.ASS.Z. 1989-09-18T15:21:31.92 10.0 undecidable manual SG 324 0.0049 0.06 0.7
--.AM8.Z. 1989-09-18T15:21:31.50 10.0 undecidable manual PG 21 0.0091 -0.05 1.3
--.ARV.Z. 1989-09-18T15:21:30.50 10.0 undecidable manual PG 352 0.008 1.09 0.2
--.CP9.Z. 1989-09-18T15:21:26.70 10.0 undecidable manual PG 187 0.0067 -0.01 1.6
--.AZI.Z. 1989-09-18T15:21:26.27 10.0 undecidable manual PG 157 0.006 1.06 0.3
--.MNS.Z. 1989-09-18T15:21:25.20 10.0 undecidable manual SG 233 0.0033 -0.45 0.6
--.ALP.Z. 1989-09-18T15:21:25.82 10.0 undecidable manual SG 63 0.0035 -0.46 0.3
--.CM8.Z. 1989-09-18T15:21:23.00 10.0 undecidable manual PG? 3 0.0053 -0.69 0.2
--.ASS.Z. 1989-09-18T15:21:23.14 10.0 undecidable manual PG 324 0.0049 0.04 1.8
--.ALP.Z. 1989-09-18T15:21:19.71 10.0 undecidable manual PG 63 0.0035 -0.16 1.4
--.MNS.Z. 1989-09-18T15:21:19.49 10.0 positive manual PG 233 0.0033 -0.02 3.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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