Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 22-10-2020 and time 07:29:16 (UTC) in region 4 km E Monteleone di Spoleto (PG)

A magnitude ML 1.0 earthquake occured in region: 4 km E Monteleone di Spoleto (PG), on

  • 22-10-2020 07:29:16 (UTC)
  • 22-10-2020 09:29:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6440, 13.0050 at 12 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 4 599 599
Cascia PG 8 3217 3816
Poggiodomo PG 10 117 3933
Leonessa RI 10 2435 6368
Cittareale RI 13 482 6850
Polino TR 15 233 7083
Posta RI 15 694 7777
Scheggino PG 16 461 8238
Sant'Anatolia di Narco PG 17 564 8802
Ferentillo TR 18 1913 10715
Borbona RI 18 617 11332
Vallo di Nera PG 18 364 11696
Norcia PG 18 4957 16653
Poggio Bustone RI 18 2055 18708
Rivodutri RI 19 1253 19961
Morro Reatino RI 19 373 20334

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km E of Terni (111501 inhabitants)
43 Km SE of Foligno (57155 inhabitants)
46 Km NW of L'Aquila (69753 inhabitants)
57 Km W of Teramo (54892 inhabitants)
72 Km SE of Perugia (166134 inhabitants)
75 Km NE of Guidonia Montecelio (88673 inhabitants)
77 Km N of Tivoli (56533 inhabitants)
78 Km E of Viterbo (67173 inhabitants)
94 Km NE of Roma (2864731 inhabitants)
95 Km W of Montesilvano (53738 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 1.0 2020-10-22
07:29:16		 42.6437 13.0047 12 2020-10-22
07:33:19		 Sala Sismica INGV-Roma 84017071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-22 07:29:16 ± 0.07
Latitude 42.6437 ± 0.0036
Longitude 13.0047 ± 0.0049
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84017071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 338
Semi-minor axis of confidence ellipse (meter) 336
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 222
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
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) 0.04856
Epicentral distance of station farthest from the epicenter (degree) 0.44157
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 84017071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-22 07:33:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2020-10-22T07:29:32.22 0.1 undecidable manual S 93 49.0176 92 0.1 93
IV.MOMA.HHZ. 2020-10-22T07:29:29.90 0.1 undecidable manual S 297 39.627 93 0.28 90
IV.RM33.EHZ. 2020-10-22T07:29:25.07 0.3 undecidable manual S 131 22.755 97 -0.06 72
IV.TERO.HHZ. 2020-10-22T07:29:25.55 0.1 undecidable manual P 93 49.0176 92 0 94
IV.NRCA.HHZ. 2020-10-22T07:29:25.02 0.3 undecidable manual S 23 22.8549 97 -0.15 72
IV.ARRO.EHZ. 2020-10-22T07:29:24.29 0.3 undecidable manual S 250 20.7681 99 -0.32 69
IV.MOMA.HHZ. 2020-10-22T07:29:24.34 0.6 negative manual P 297 39.627 93 0.23 46
IV.NRCA.HHZ. 2020-10-22T07:29:21.53 0.1 negative manual P 23 22.8549 97 -0.01 98
IV.ARRO.EHZ. 2020-10-22T07:29:21.08 0.6 positive manual P 250 20.7681 99 -0.14 48
IV.LNSS.HHZ. 2020-10-22T07:29:21.08 0.3 undecidable manual S 147 5.3946 150 -0.05 75
IV.RM33.EHZ. 2020-10-22T07:29:21.52 0.3 negative manual P 131 22.755 97 0 73
IV.GAVE.EHZ. 2020-10-22T07:29:21.91 0.3 undecidable manual S 301 10.4784 126 -0.14 74
IV.LNSS.HHZ. 2020-10-22T07:29:19.30 0.1 undecidable manual P 147 5.3946 150 0.09 100
IV.GAVE.EHZ. 2020-10-22T07:29:19.80 0.1 positive manual P 301 10.4784 126 0.06 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.2 0.00020250000000000002 0.34 AML other m 2020-10-22T07:29:21.39
IV.LNSS.HHN. ML:1.2 0.000195 0.58 AML other m 2020-10-22T07:29:21.27
IV.RM33.EHN. ML:1.0 0.00007185 0.22 AML other m 2020-10-22T07:29:25.29
IV.RM33.EHE. ML:1.0 0.0000598 1.18 AML other m 2020-10-22T07:29:25.90
IV.NRCA.HHN. ML:0.9 0.000043700000000000005 0.56 AML other m 2020-10-22T07:29:26.89
IV.NRCA.HHE. ML:1.0 0.0000605 0.1 AML other m 2020-10-22T07:29:27.01
IV.TERO.HHE. ML:0.9 0.000019799999999999997 0.72 AML other m 2020-10-22T07:29:32.58
IV.TERO.HHN. ML:0.9 0.000021400000000000002 1.42 AML other m 2020-10-22T07:29:33.90
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