Earthquake with magnitude of Md 2.2 on date 21-07-1999 and time 10:00:11 (Italy) in region 5 km W Micigliano (RI)

A magnitude Md 2.2 earthquake occured in region: 5 km W Micigliano (RI), on

  • 21-07-1999 08:00:11 (UTC)
  • 21-07-1999 10:00:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.46, 12.99 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 5 127 127
Cantalice RI 7 2755 2882
Castel Sant'Angelo RI 8 1308 4190
Borgo Velino RI 8 972 5162
Antrodoco RI 9 2588 7750
Cittaducale RI 9 6828 14578
Poggio Bustone RI 10 2055 16633
Posta RI 11 694 17327
Leonessa RI 12 2435 19762
Rieti RI 12 47698 67460
Rivodutri RI 13 1253 68713
Borbona RI 13 617 69330
Morro Reatino RI 15 373 69703
Concerviano RI 15 291 69994
Labro RI 17 374 70368
Belmonte in Sabina RI 18 636 71004
Colli sul Velino RI 18 533 71537
Greccio RI 18 1558 73095
Polino TR 18 233 73328
Cagnano Amiterno AQ 19 1369 74697
Contigliano RI 19 3783 78480
Petrella Salto RI 19 1197 79677

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km E of Terni (111501 inhabitants)
36 Km W of L'Aquila (69753 inhabitants)
56 Km NE of Guidonia Montecelio (88673 inhabitants)
58 Km N of Tivoli (56533 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
62 Km W of Teramo (54892 inhabitants)
73 Km E of Viterbo (67173 inhabitants)
76 Km NE of Roma (2864731 inhabitants)
87 Km SE of Perugia (166134 inhabitants)
88 Km N of Velletri (53303 inhabitants)
95 Km W of Montesilvano (53738 inhabitants)
97 Km NE of Pomezia (62966 inhabitants)
97 Km W of Chieti (51815 inhabitants)
99 Km NE of Fiumicino (78395 inhabitants)
100 Km N 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 2.2 1999-07-21
08:00:11
42.46 12.99 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 370839
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-07-21 08:00:11 ± 0.176
Latitude 42.46 ± 0.01
Longitude 12.99 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 370839

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) 1752.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.00219
Epicentral distance of station farthest from the epicenter (degree) 0.00712
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:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 370839
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
--.SNTG.Z. 1999-07-21T08:00:39.12 10.0 undecidable manual SG 357 0.0071 0.12 0.5
--.ASS.Z. 1999-07-21T08:00:35.50 10.0 undecidable manual SG 337 0.0058 0.65 0.1
--.SNTG.Z. 1999-07-21T08:00:26.76 10.0 undecidable manual PG 357 0.0071 -0.66 0.3
--.NRCA.Z. 1999-07-21T08:00:26.22 10.0 undecidable manual SG 13 0.0034 0.44 0.3
--.ASS.Z. 1999-07-21T08:00:25.25 10.0 undecidable manual PG 337 0.0058 0.48 0.7
--.MNS.Z. 1999-07-21T08:00:20.99 10.0 undecidable manual SG 251 0.0022 -0.32 0.5
--.NRCA.Z. 1999-07-21T08:00:19.43 10.0 positive manual PG 13 0.0034 -0.36 2.2
--.AQU.Z. 1999-07-21T08:00:18.95 10.0 undecidable manual PG 109 0.0028 0.31 1.2
--.MNS.Z. 1999-07-21T08:00:17.26 10.0 positive manual PG 251 0.0022 0.05 3.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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