Earthquake with magnitude of Md 2.3 on date 21-07-1999 and time 05:46:37 (Italy) in region 3 km W Micigliano (RI)

A magnitude Md 2.3 earthquake occured in region: 3 km W Micigliano (RI), on

  • 21-07-1999 03:46:37 (UTC)
  • 21-07-1999 05:46:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.44, 13.02 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
Micigliano RI 3 127 127
Borgo Velino RI 5 972 1099
Castel Sant'Angelo RI 5 1308 2407
Antrodoco RI 6 2588 4995
Cittaducale RI 8 6828 11823
Cantalice RI 10 2755 14578
Posta RI 11 694 15272
Borbona RI 12 617 15889
Poggio Bustone RI 13 2055 17944
Concerviano RI 13 291 18235
Rieti RI 13 47698 65933
Leonessa RI 14 2435 68368
Rivodutri RI 16 1253 69621
Petrella Salto RI 17 1197 70818
Belmonte in Sabina RI 17 636 71454
Cagnano Amiterno AQ 17 1369 72823
Morro Reatino RI 18 373 73196
Longone Sabino RI 19 597 73793
Rocca Sinibalda RI 20 815 74608

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km W of L'Aquila (69753 inhabitants)
33 Km E of Terni (111501 inhabitants)
55 Km NE of Guidonia Montecelio (88673 inhabitants)
56 Km NE of Tivoli (56533 inhabitants)
61 Km W of Teramo (54892 inhabitants)
63 Km SE of Foligno (57155 inhabitants)
75 Km E of Viterbo (67173 inhabitants)
75 Km NE of Roma (2864731 inhabitants)
86 Km N of Velletri (53303 inhabitants)
90 Km SE of Perugia (166134 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
95 Km W of Chieti (51815 inhabitants)
96 Km NE of Pomezia (62966 inhabitants)
98 Km W of Pescara (121014 inhabitants)
98 Km NE of Fiumicino (78395 inhabitants)
99 Km NE of Aprilia (73446 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 1999-07-21
03:46:37
42.44 13.02 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 370829
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-07-21 03:46:37 ± 0.162
Latitude 42.44 ± 0.01
Longitude 13.02 ± 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 370829

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) 1603.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 150
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) 0.00607
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 4
Type of magnitude Md
Reference to an origin 370829
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:47:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ASS.Z. 1999-07-21T03:47:01.55 10.0 undecidable manual SG 336 0.0061 0.72 0
--.NRCA.Z. 1999-07-21T03:46:51.96 10.0 undecidable manual SG 9 0.0036 0.07 0.5
--.ASS.Z. 1999-07-21T03:46:51.00 10.0 undecidable manual PG 336 0.0061 0.15 0.9
--.MNS.Z. 1999-07-21T03:46:47.10 10.0 undecidable manual SG 256 0.0023 -0.23 0.4
--.NRCA.Z. 1999-07-21T03:46:45.37 10.0 positive manual PG 9 0.0036 -0.32 1.4
--.AQU.Z. 1999-07-21T03:46:44.70 10.0 undecidable manual PG 106 0.0027 0.24 1
--.MNS.Z. 1999-07-21T03:46:43.70 10.0 positive manual PG 256 0.0023 0.01 2.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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