Earthquake with magnitude of Md 2.3 on date 21-10-1996 and time 17:11:54 (Italy) in region 4 km W Montereale (AQ)

A magnitude Md 2.3 earthquake occured in region: 4 km W Montereale (AQ), on

  • 21-10-1996 15:11:54 (UTC)
  • 21-10-1996 17:11:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.52, 13.2 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
Montereale AQ 4 2581 2581
Borbona RI 6 617 3198
Cagnano Amiterno AQ 7 1369 4567
Capitignano AQ 8 665 5232
Posta RI 9 694 5926
Barete AQ 10 737 6663
Cittareale RI 12 482 7145
Pizzoli AQ 12 4326 11471
Micigliano RI 14 127 11598
Amatrice RI 15 2657 14255
Campotosto AQ 15 542 14797
Antrodoco RI 15 2588 17385
Scoppito AQ 17 3727 21112
Borgo Velino RI 17 972 22084
Castel Sant'Angelo RI 20 1308 23392

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km NW of L'Aquila (69753 inhabitants)
44 Km W of Teramo (54892 inhabitants)
46 Km E of Terni (111501 inhabitants)
64 Km SE of Foligno (57155 inhabitants)
69 Km NE of Guidonia Montecelio (88673 inhabitants)
70 Km NE of Tivoli (56533 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
81 Km W of Chieti (51815 inhabitants)
83 Km W of Pescara (121014 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
91 Km NE of Roma (2864731 inhabitants)
93 Km SE of Perugia (166134 inhabitants)
99 Km NE of Velletri (53303 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 2.3 1996-10-21
15:11:54
42.52 13.2 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 255189
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1996-10-21 15:11:54 ± 0.349
Latitude 42.52 ± 0.02
Longitude 13.20 ± 0.03
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 255189

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) 3299.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 148
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) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00194
Epicentral distance of station farthest from the epicenter (degree) 0.00899
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 255189
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:01:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ASS.Z. 1996-10-21T15:12:18.30 10.0 undecidable manual SG 323 0.0061 -1.12 0.2
--.ARV.Z. 1996-10-21T15:12:14.89 10.0 undecidable manual PG? 349 0.009 -0.07 0.6
--.SDI.Z. 1996-10-21T15:12:14.79 10.0 undecidable manual PG 150 0.0083 1.23 0.4
--.PQ9.Z. 1996-10-21T15:12:13.00 10.0 undecidable manual SG 163 0.0046 -1.19 0.2
--.MNS.Z. 1996-10-21T15:12:11.82 10.0 undecidable manual SG 251 0.0036 1.29 0.2
--.ASS.Z. 1996-10-21T15:12:09.62 10.0 undecidable manual PG 323 0.0061 0.62 1.3
--.PQ9.Z. 1996-10-21T15:12:06.30 10.0 undecidable manual PG 163 0.0046 0.32 1.8
--.MNS.Z. 1996-10-21T15:12:03.38 10.0 positive manual PG 251 0.0036 -0.49 3.2
--.AQU.Z. 1996-10-21T15:12:03.12 10.0 undecidable manual SG 137 0.0019 -0.27 0.7
--.AQU.Z. 1996-10-21T15:11:59.12 10.0 undecidable manual PG 137 0.0019 -0.63 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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