Earthquake with magnitude of Md 2.4 on date 21-09-1989 and time 01:19:27 (Italy) in region 4 km NW Montereale (AQ)

A magnitude Md 2.4 earthquake occured in region: 4 km NW Montereale (AQ), on

  • 20-09-1989 23:19:27 (UTC)
  • 21-09-1989 01:19:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.56, 13.21 at 10 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
Montereale AQ 5 2581 2581
Cittareale RI 8 482 3063
Borbona RI 8 617 3680
Capitignano AQ 8 665 4345
Posta RI 10 694 5039
Amatrice RI 10 2657 7696
Cagnano Amiterno AQ 11 1369 9065
Campotosto AQ 13 542 9607
Barete AQ 13 737 10344
Pizzoli AQ 15 4326 14670
Accumoli RI 16 667 15337
Micigliano RI 17 127 15464
Antrodoco RI 19 2588 18052

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NW of L'Aquila (69753 inhabitants)
42 Km W of Teramo (54892 inhabitants)
46 Km E of Terni (111501 inhabitants)
61 Km SE of Foligno (57155 inhabitants)
74 Km NE of Guidonia Montecelio (88673 inhabitants)
74 Km NE of Tivoli (56533 inhabitants)
77 Km W of Montesilvano (53738 inhabitants)
82 Km W of Chieti (51815 inhabitants)
83 Km W of Pescara (121014 inhabitants)
91 Km SE of Perugia (166134 inhabitants)
92 Km E of Viterbo (67173 inhabitants)
95 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 2.4
ML-VAX 1.5
1989-09-20
23:19:27
42.56 13.21 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 99889
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-09-20 23:19:27 ± 0.116
Latitude 42.56 ± 0.01
Longitude 13.21 ± 0.01
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 99889

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) 1226.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
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) 0.00219
Epicentral distance of station farthest from the epicenter (degree) 0.00858
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 99889
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:33:18

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 99889
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
--.SDI.Z. 1989-09-20T23:20:00.80 10.0 undecidable manual SG 152 0.0086 0.41 0.3
--.ASS.Z. 1989-09-20T23:19:50.18 10.0 undecidable manual SG 321 0.0058 0.28 0.5
--.ARV.Z. 1989-09-20T23:19:45.95 10.0 undecidable manual PG 348 0.0086 -0.05 1.4
--.SDI.Z. 1989-09-20T23:19:45.80 10.0 undecidable manual PG 152 0.0086 -0.1 1.4
--.MNS.Z. 1989-09-20T23:19:43.50 10.0 undecidable manual SG 246 0.0038 0.77 0.1
--.ASS.Z. 1989-09-20T23:19:40.65 10.0 undecidable manual PG 321 0.0058 0.39 0.9
--.ALP.Z. 1989-09-20T23:19:39.82 10.0 undecidable manual SG 49 0.0031 -0.19 0.6
--.MNS.Z. 1989-09-20T23:19:35.69 10.0 positive manual PG 246 0.0038 -0.43 1.6
--.ALP.Z. 1989-09-20T23:19:34.42 10.0 undecidable manual PG 49 0.0031 -0.12 1.8
--.AQU.Z. 1989-09-20T23:19:33.00 10.0 undecidable manual PG 145 0.0022 0.26 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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