Earthquake with magnitude of Md 2.3 on date 21-09-1996 and time 23:11:23 (Italy) in region 7 km N Posta (RI)

A magnitude Md 2.3 earthquake occured in region: 7 km N Posta (RI), on

  • 21-09-1996 21:11:23 (UTC)
  • 21-09-1996 23:11:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.59, 13.07 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
Posta RI 7 694 694
Cittareale RI 8 482 1176
Leonessa RI 9 2435 3611
Borbona RI 10 617 4228
Monteleone di Spoleto PG 12 599 4827
Micigliano RI 15 127 4954
Cascia PG 15 3217 8171
Montereale AQ 16 2581 10752
Poggiodomo PG 18 117 10869
Poggio Bustone RI 18 2055 12924
Amatrice RI 18 2657 15581
Accumoli RI 19 667 16248
Polino TR 19 233 16481
Cagnano Amiterno AQ 19 1369 17850
Antrodoco RI 19 2588 20438
Cantalice RI 19 2755 23193
Rivodutri RI 19 1253 24446

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Terni (111501 inhabitants)
38 Km NW of L'Aquila (69753 inhabitants)
51 Km SE of Foligno (57155 inhabitants)
52 Km W of Teramo (54892 inhabitants)
71 Km NE of Guidonia Montecelio (88673 inhabitants)
73 Km NE of Tivoli (56533 inhabitants)
80 Km SE of Perugia (166134 inhabitants)
82 Km E of Viterbo (67173 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
91 Km NE of Roma (2864731 inhabitants)
94 Km W of Chieti (51815 inhabitants)
95 Km W of Pescara (121014 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 1996-09-21
21:11:23
42.59 13.07 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 252649
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1996-09-21 21:11:23 ± 0.344
Latitude 42.59 ± 0.02
Longitude 13.07 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 252649

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) 2985.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 166
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
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) 0.003
Epicentral distance of station farthest from the epicenter (degree) 0.00931
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 252649
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 20:59:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SDI.Z. 1996-09-21T21:11:45.94 10.0 undecidable manual PG 148 0.0093 1.13 0.1
--.MNS.Z. 1996-09-21T21:11:38.50 10.0 undecidable manual SG 235 0.0032 0.35 0.5
--.PQ9.Z. 1996-09-21T21:11:36.83 10.0 undecidable manual PG 156 0.0055 -0.21 1.2
--.ASS.Z. 1996-09-21T21:11:36.00 10.0 undecidable manual PG 327 0.005 -0.12 1.3
--.AQU.Z. 1996-09-21T21:11:35.81 10.0 undecidable manual SG 134 0.003 -1.26 0
--.AQU.Z. 1996-09-21T21:11:31.52 10.0 undecidable manual PG 134 0.003 -0.02 1.4
--.MNS.Z. 1996-09-21T21:11:31.66 10.0 positive manual PG 235 0.0032 -0.24 2.5
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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