Earthquake with magnitude of Md 2.4 on date 26-07-1999 and time 23:59:45 (Italy) in region 3 km W Castel Sant'Angelo (RI)

A magnitude Md 2.4 earthquake occured in region: 3 km W Castel Sant'Angelo (RI), on

  • 26-07-1999 21:59:45 (UTC)
  • 26-07-1999 23:59:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.41, 13 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
Castel Sant'Angelo RI 3 1308 1308
Borgo Velino RI 5 972 2280
Cittaducale RI 5 6828 9108
Antrodoco RI 7 2588 11696
Micigliano RI 7 127 11823
Concerviano RI 9 291 12114
Cantalice RI 11 2755 14869
Rieti RI 12 47698 62567
Belmonte in Sabina RI 13 636 63203
Petrella Salto RI 13 1197 64400
Poggio Bustone RI 14 2055 66455
Longone Sabino RI 15 597 67052
Posta RI 15 694 67746
Rocca Sinibalda RI 16 815 68561
Borbona RI 16 617 69178
Rivodutri RI 17 1253 70431
Leonessa RI 18 2435 72866
Varco Sabino RI 18 187 73053
Fiamignano RI 19 1413 74466
Cagnano Amiterno AQ 19 1369 75835
Contigliano RI 19 3783 79618
Torricella in Sabina RI 19 1342 80960
Morro Reatino RI 19 373 81333
Greccio RI 20 1558 82891

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km W of L'Aquila (69753 inhabitants)
34 Km SE of Terni (111501 inhabitants)
50 Km NE of Guidonia Montecelio (88673 inhabitants)
52 Km NE of Tivoli (56533 inhabitants)
64 Km W of Teramo (54892 inhabitants)
66 Km SE of Foligno (57155 inhabitants)
71 Km NE of Roma (2864731 inhabitants)
74 Km E of Viterbo (67173 inhabitants)
82 Km N of Velletri (53303 inhabitants)
92 Km NE of Pomezia (62966 inhabitants)
93 Km SE of Perugia (166134 inhabitants)
95 Km NE of Fiumicino (78395 inhabitants)
95 Km NE of Aprilia (73446 inhabitants)
95 Km W of Montesilvano (53738 inhabitants)
96 Km W of Chieti (51815 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 1999-07-26
21:59:45
42.41 13 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 371159
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-07-26 21:59:45 ± 0.137
Latitude 42.41 ± 0.01
Longitude 13.00 ± 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 371159

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) 1423.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 122
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.0021
Epicentral distance of station farthest from the epicenter (degree) 0.00826
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 371159
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:48:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ASS.Z. 1999-07-26T22:00:10.78 10.0 undecidable manual SG 338 0.0063 0.85 0
--.SDI.Z. 1999-07-26T22:00:04.20 10.0 undecidable manual PG 138 0.0083 0.51 0.5
--.PQ9.Z. 1999-07-26T22:00:03.58 10.0 undecidable manual SG 142 0.0043 0.75 0.1
--.NRCA.Z. 1999-07-26T22:00:01.56 10.0 undecidable manual SG 10 0.0039 0.3 0.5
--.ASS.Z. 1999-07-26T21:59:59.31 10.0 undecidable manual PG 338 0.0063 -0.25 1.2
--.AQU.Z. 1999-07-26T21:59:56.99 10.0 undecidable manual SG 99 0.0027 0.09 0.7
--.MNS.Z. 1999-07-26T21:59:55.00 10.0 undecidable manual SG 264 0.0021 0.02 0.7
--.PQ9.Z. 1999-07-26T21:59:55.11 10.0 undecidable manual PG 142 0.0043 -0.34 1.2
--.NRCA.Z. 1999-07-26T21:59:54.46 10.0 undecidable manual PG 10 0.0039 -0.09 1.8
--.AQU.Z. 1999-07-26T21:59:51.51 10.0 undecidable manual PG 99 0.0027 -0.52 0.7
--.MNS.Z. 1999-07-26T21:59:50.87 10.0 negative manual PG 264 0.0021 -0.06 3.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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