Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 27-10-2020 and time 23:58:22 (UTC) in region 7 km W Cittareale (RI)

A magnitude ML 1.2 earthquake occured in region: 7 km W Cittareale (RI), on

  • 27-10-2020 23:58:22 (UTC)
  • 28-10-2020 00:58:22 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.5910, 13.0880 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Cittareale RI 7 482 482
Posta RI 8 694 1176
Borbona RI 9 617 1793
Leonessa RI 11 2435 4228
Monteleone di Spoleto PG 13 599 4827
Montereale AQ 15 2581 7408
Cascia PG 16 3217 10625
Micigliano RI 16 127 10752
Amatrice RI 17 2657 13409
Accumoli RI 18 667 14076
Cagnano Amiterno AQ 18 1369 15445
Poggiodomo PG 18 117 15562
Poggio Bustone RI 19 2055 17617
Capitignano AQ 19 665 18282
Antrodoco RI 19 2588 20870
Polino TR 20 233 21103

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Terni (111501 inhabitants)
37 Km NW of L'Aquila (69753 inhabitants)
51 Km W of Teramo (54892 inhabitants)
51 Km SE of Foligno (57155 inhabitants)
72 Km NE of Guidonia Montecelio (88673 inhabitants)
74 Km NE of Tivoli (56533 inhabitants)
81 Km SE of Perugia (166134 inhabitants)
83 Km E of Viterbo (67173 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
92 Km NE of Roma (2864731 inhabitants)
93 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
Reviewed
Rev100 		ML 1.2 2020-10-27
23:58:22		 42.5913 13.088 11 2020-10-28
00:25:10		 Sala Sismica INGV-Roma 84191791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-27 23:58:22 ± 0.08
Latitude 42.5913 ± 0.0027
Longitude 13.0880 ± 0.0049
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84191791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 335
Semi-minor axis of confidence ellipse (meter) 158
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 115
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.38041
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 84191791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-28 00:25:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTRJ.HNZ. 2020-10-27T23:58:49.80 3.0 undecidable manual Pn -0.47 0
IV.MPAG.EHZ. 2020-10-27T23:58:43.22 3.0 undecidable manual P 0.25 0
IV.MMO1.HNE. 2020-10-27T23:58:36.05 0.6 undecidable manual S 30 39.3273 50 0.16 46
IV.TERO.HHZ. 2020-10-27T23:58:36.31 0.6 undecidable manual S 85 42.2244 50 -0.36 45
IV.RCAV.EHZ. 2020-10-27T23:58:34.91 3.0 undecidable manual P -2.48 0
IV.MTRA.HNE. 2020-10-27T23:58:33.35 0.3 undecidable manual S 54 31.1466 50 -0.35 70
IV.NRCA.HHZ. 2020-10-27T23:58:32.14 0.6 undecidable manual S 5 26.9508 50 -0.44 46
IV.SMA1.EHN. 2020-10-27T23:58:30.91 0.6 undecidable manual S 78 20.6682 50 0 49
IV.MMO1.HNE. 2020-10-27T23:58:30.33 0.3 undecidable manual P 30 39.3273 50 -0.05 72
IV.TERO.HHZ. 2020-10-27T23:58:30.64 0.3 undecidable manual P 85 42.2244 50 -0.2 70
IV.MTRA.HNE. 2020-10-27T23:58:29.35 0.3 undecidable manual P 54 31.1466 50 0.23 69
IV.T1299.HNN. 2020-10-27T23:58:29.71 0.6 undecidable manual S 73 16.5723 123 -0.01 50
IV.NRCA.HHZ. 2020-10-27T23:58:28.31 0.1 undecidable manual P 5 26.9508 50 -0.17 96
IV.ARRO.EHZ. 2020-10-27T23:58:28.35 0.1 undecidable manual P 267 26.3514 50 -0.04 98
IV.RM33.EHZ. 2020-10-27T23:58:28.79 0.3 undecidable manual S 131 13.7751 128 -0.15 72
IV.SMA1.EHN. 2020-10-27T23:58:27.67 0.1 undecidable manual P 78 20.6682 50 0.16 95
IV.LNSS.HHZ. 2020-10-27T23:58:26.86 0.3 undecidable manual S 288 4.0959 159 -0.01 75
IV.T1299.HNN. 2020-10-27T23:58:26.97 0.1 undecidable manual P 73 16.5723 123 0.14 97
IV.RM33.EHZ. 2020-10-27T23:58:26.45 0.1 undecidable manual P 131 13.7751 128 0.08 100
IV.LNSS.HHZ. 2020-10-27T23:58:25.34 0.1 undecidable manual P 288 4.0959 159 0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:1.1 0.00021850000000000003 1.08 AML other m 2020-10-27T23:58:26.43
IV.LNSS.HHE. ML:1.3 0.00029949999999999996 0.4 AML other m 2020-10-27T23:58:27.03
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download