Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 15-12-2020 and time 11:49:48 (UTC) in region 8 km E Monteleone di Spoleto (PG)

A magnitude ML 1.2 earthquake occured in region: 8 km E Monteleone di Spoleto (PG), on

  • 15-12-2020 11:49:48 (UTC)
  • 15-12-2020 12:49:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6320, 13.0500 at 16 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
Monteleone di Spoleto PG 8 599 599
Cittareale RI 9 482 1081
Cascia PG 10 3217 4298
Leonessa RI 10 2435 6733
Posta RI 13 694 7427
Poggiodomo PG 13 117 7544
Borbona RI 15 617 8161
Polino TR 18 233 8394
Accumoli RI 18 667 9061
Norcia PG 18 4957 14018
Amatrice RI 20 2657 16675
Poggio Bustone RI 20 2055 18730
Scheggino PG 20 461 19191
Micigliano RI 20 127 19318

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Terni (111501 inhabitants)
42 Km NW of L'Aquila (69753 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
54 Km W of Teramo (54892 inhabitants)
75 Km NE of Guidonia Montecelio (88673 inhabitants)
75 Km SE of Perugia (166134 inhabitants)
77 Km N of Tivoli (56533 inhabitants)
81 Km E of Viterbo (67173 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
94 Km NE of Roma (2864731 inhabitants)
97 Km W of Chieti (51815 inhabitants)
97 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 2020-12-15
11:49:48		 42.6325 13.0497 16 2020-12-15
11:54:33		 Sala Sismica INGV-Roma 85444971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-15 11:49:48 ± 0.09
Latitude 42.6325 ± 0.0045
Longitude 13.0497 ± 0.0086
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85444971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 570
Semi-minor axis of confidence ellipse (meter) 483
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 284
Circular confidence region, given by single value of horizontal uncertainty (meter) 570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 180
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.40469
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 7
Type of magnitude ML
Reference to an origin 85444971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-15 11:54:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2020-12-15T11:50:17.14 3.0 undecidable manual S 6.71 0
IV.RDP.HHZ. 2020-12-15T11:50:11.55 3.0 undecidable manual S -0.62 0
IV.MURB.HHZ. 2020-12-15T11:50:03.51 3.0 negative manual P 2.61 0
IV.FDMO.HHZ. 2020-12-15T11:50:02.92 0.1 undecidable manual S 4 44.9217 98 0.19 90
IV.FOSV.EHZ. 2020-12-15T11:49:59.87 3.0 undecidable manual P -0.31 0
IV.ARRO.EHZ. 2020-12-15T11:49:57.26 0.1 undecidable manual S 256 23.9538 111 -0.02 95
IV.NRCA.HNE. 2020-12-15T11:49:56.80 0.1 undecidable manual S 13 22.9548 112 -0.23 93
IV.FDMO.HHZ. 2020-12-15T11:49:56.68 0.1 undecidable manual P 4 44.9217 98 0.09 92
IV.GAVE.EHZ. 2020-12-15T11:49:54.86 0.1 undecidable manual S 298 14.2746 128 -0.17 95
IV.ARRO.EHZ. 2020-12-15T11:49:53.43 0.1 undecidable manual P 256 23.9538 111 -0.01 95
IV.NRCA.HNE. 2020-12-15T11:49:53.25 0.1 undecidable manual P 13 22.9548 112 -0.05 96
IV.LNSS.HHZ. 2020-12-15T11:49:53.43 0.1 undecidable manual S 193 3.3966 166 0.02 100
IV.GAVE.EHZ. 2020-12-15T11:49:52.20 0.1 undecidable manual P 298 14.2746 128 0.06 98
IV.LNSS.HHZ. 2020-12-15T11:49:51.33 0.1 undecidable manual P 193 3.3966 166 0.12 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:1.7 0.000418 0.12 AML other m 2020-12-15T11:49:55.07
IV.GAVE.EHN. ML:1.6 0.000334 0.52 AML other m 2020-12-15T11:49:55.27
IV.ARRO.EHN. ML:1.2 0.00008245 0.52 AML other m 2020-12-15T11:49:57.51
IV.ARRO.EHE. ML:1.0 0.0000544 0.24 AML other m 2020-12-15T11:49:57.49
IV.GAVE.HNE. ML:1.7 0.00043084155000000003 0.1024 AML other m 2020-12-15T11:49:55.06
IV.FDMO.HHE. ML:0.8 0.000019629285 0.1344 AML other m 2020-12-15T11:50:03.71
IV.FDMO.HHN. ML:0.7 0.000017459929999999997 0.32 AML other m 2020-12-15T11:50:03.06
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