Earthquake with magnitude of Md 2.3 on date 31-01-2002 and time 09:26:37 (Italy) in region 5 km N Posta (RI)

A magnitude Md 2.3 earthquake occured in region: 5 km N Posta (RI), on

  • 31-01-2002 08:26:37 (UTC)
  • 31-01-2002 09:26:37 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.57, 13.09 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
Posta RI 5 694 694
Borbona RI 7 617 1311
Cittareale RI 8 482 1793
Leonessa RI 11 2435 4228
Montereale AQ 14 2581 6809
Micigliano RI 14 127 6936
Monteleone di Spoleto PG 15 599 7535
Cagnano Amiterno AQ 17 1369 8904
Antrodoco RI 17 2588 11492
Amatrice RI 17 2657 14149
Cascia PG 18 3217 17366
Capitignano AQ 18 665 18031
Accumoli RI 19 667 18698
Poggio Bustone RI 19 2055 20753
Borgo Velino RI 19 972 21725
Cantalice RI 19 2755 24480

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km NW of L'Aquila (69753 inhabitants)
37 Km E of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
53 Km SE of Foligno (57155 inhabitants)
70 Km NE of Guidonia Montecelio (88673 inhabitants)
72 Km NE of Tivoli (56533 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
83 Km E of Viterbo (67173 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
91 Km NE of Roma (2864731 inhabitants)
92 Km W of Chieti (51815 inhabitants)
93 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 2002-01-31
08:26:37
42.57 13.09 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 435599
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2002-01-31 08:26:37 ± 0.107
Latitude 42.57 ± 0.01
Longitude 13.09 ± 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 435599

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) 1011.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
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) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00227
Epicentral distance of station farthest from the epicenter (degree) 0.00526
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 435599
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 23:51:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ASS.Z. 2002-01-31T08:26:57.85 10.0 undecidable manual SG 326 0.0053 -0.03 0.6
--.MNS.Z. 2002-01-31T08:26:50.40 10.0 undecidable manual SG 238 0.0032 -0.14 0.7
--.ASS.Z. 2002-01-31T08:26:49.65 10.0 undecidable manual PG 326 0.0053 0.54 0.4
--.NRCA.Z. 2002-01-31T08:26:47.33 10.0 undecidable manual SG 3 0.0023 -0.09 0.8
--.AQU.Z. 2002-01-31T08:26:44.20 10.0 undecidable manual PG 133 0.0028 0.12 1.9
--.MNS.Z. 2002-01-31T08:26:44.75 10.0 undecidable manual PG 238 0.0032 -0.13 1.8
--.NRCA.Z. 2002-01-31T08:26:42.69 10.0 undecidable manual PG 3 0.0023 -0.38 0.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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