Earthquake with magnitude of Md 2.2 on date 10-07-1991 and time 17:04:41 (Italy) in region 4 km E Micigliano (RI)

A magnitude Md 2.2 earthquake occured in region: 4 km E Micigliano (RI), on

  • 10-07-1991 15:04:41 (UTC)
  • 10-07-1991 17:04:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.46, 13.1 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
Micigliano RI 4 127 127
Antrodoco RI 5 2588 2715
Borgo Velino RI 7 972 3687
Borbona RI 7 617 4304
Posta RI 8 694 4998
Castel Sant'Angelo RI 9 1308 6306
Cagnano Amiterno AQ 10 1369 7675
Montereale AQ 14 2581 10256
Cittaducale RI 15 6828 17084
Barete AQ 15 737 17821
Scoppito AQ 16 3727 21548
Pizzoli AQ 16 4326 25874
Leonessa RI 16 2435 28309
Cantalice RI 16 2755 31064
Concerviano RI 18 291 31355
Capitignano AQ 18 665 32020
Petrella Salto RI 18 1197 33217
Poggio Bustone RI 19 2055 35272
Cittareale RI 19 482 35754

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km W of L'Aquila (69753 inhabitants)
39 Km E of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
59 Km NE of Guidonia Montecelio (88673 inhabitants)
60 Km NE of Tivoli (56533 inhabitants)
65 Km SE of Foligno (57155 inhabitants)
81 Km NE of Roma (2864731 inhabitants)
82 Km E of Viterbo (67173 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
88 Km W of Chieti (51815 inhabitants)
90 Km NE of Velletri (53303 inhabitants)
91 Km W of Pescara (121014 inhabitants)
93 Km SE of Perugia (166134 inhabitants)
100 Km NE of Pomezia (62966 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
ML-VAX 1.5
1991-07-10
15:04:41
42.46 13.1 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 145029
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-07-10 15:04:41 ± 0.434
Latitude 42.46 ± 0.03
Longitude 13.10 ± 0.03
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 145029

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) 3828
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 210
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.00939
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 145029
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:15:25

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 145029
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1991-07-10T15:05:19.00 10.0 undecidable manual SG 353 0.0094 0.61 0.3
--.ASS.Z. 1991-07-10T15:05:06.53 10.0 undecidable manual SG 331 0.0062 -0.35 0.6
--.ARV.Z. 1991-07-10T15:05:03.50 10.0 undecidable manual PG 353 0.0094 0.56 0.9
--.RMF.Z. 1991-07-10T15:04:59.35 10.0 undecidable manual SG 8 0.0045 -1.55 0
--.ALP.Z. 1991-07-10T15:04:59.55 10.0 undecidable manual SG 46 0.0042 -0.29 0.7
--.ASS.Z. 1991-07-10T15:04:57.23 10.0 undecidable manual PG 331 0.0062 0.93 0.6
--.MNS.Z. 1991-07-10T15:04:53.00 10.0 undecidable manual SG 257 0.0028 -1.26 0.1
--.ALP.Z. 1991-07-10T15:04:52.28 10.0 undecidable manual PG 46 0.0042 0.05 1.8
--.RMF.Z. 1991-07-10T15:04:52.26 10.0 undecidable manual PG 8 0.0045 -0.58 1.2
--.MNS.Z. 1991-07-10T15:04:49.11 10.0 negative manual PG 257 0.0028 0.1 3.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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