Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 18-01-2021 and time 13:22:56 (UTC) in region 1 km NE Monteleone di Spoleto (PG)

A magnitude ML 1.2 earthquake occured in region: 1 km NE Monteleone di Spoleto (PG), on

  • 18-01-2021 13:22:56 (UTC)
  • 18-01-2021 14:22:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6640, 12.9590 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 2 599 599
Poggiodomo PG 6 117 716
Cascia PG 8 3217 3933
Leonessa RI 11 2435 6368
Scheggino PG 12 461 6829
Sant'Anatolia di Narco PG 13 564 7393
Polino TR 13 233 7626
Vallo di Nera PG 14 364 7990
Ferentillo TR 15 1913 9903
Montefranco TR 17 1276 11179
Cittareale RI 17 482 11661
Cerreto di Spoleto PG 18 1075 12736
Arrone TR 18 2763 15499
Norcia PG 18 4957 20456
Rivodutri RI 18 1253 21709
Morro Reatino RI 19 373 22082
Poggio Bustone RI 19 2055 24137
Posta RI 19 694 24831
Spoleto PG 20 38218 63049

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Terni (111501 inhabitants)
39 Km SE of Foligno (57155 inhabitants)
50 Km NW of L'Aquila (69753 inhabitants)
61 Km W of Teramo (54892 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
75 Km E of Viterbo (67173 inhabitants)
76 Km N of Guidonia Montecelio (88673 inhabitants)
79 Km N of Tivoli (56533 inhabitants)
94 Km NE of Roma (2864731 inhabitants)
99 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 1.2 2021-01-18
13:22:56		 42.6645 12.959 12 2021-01-18
13:32:48		 Sala Sismica INGV-Roma 86353001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-18 13:22:56 ± 0.08
Latitude 42.6645 ± 0.0045
Longitude 12.9590 ± 0.0037
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 86353001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 438
Semi-minor axis of confidence ellipse (meter) 250
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 15
Circular confidence region, given by single value of horizontal uncertainty (meter) 440.0
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 26
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) 0.31746
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 86353001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-18 13:32:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCEL.HHZ. 2021-01-18T13:24:25.79 3.0 undecidable manual Sn -3.83 0
IV.GALF.HHZ. 2021-01-18T13:24:24.80 3.0 negative manual Pg 7.89 0
GU.RNCA.HHZ. 2021-01-18T13:24:24.28 3.0 undecidable manual Sn -1.62 0
IV.NOV.HHZ. 2021-01-18T13:24:22.41 3.0 positive manual Pg 8.06 0
IV.AIO.HHZ. 2021-01-18T13:24:22.23 3.0 negative manual Pg 6.82 0
IV.MUCR.HHZ. 2021-01-18T13:24:22.84 3.0 undecidable manual Pg 9.52 0
IV.EPZF.HHZ. 2021-01-18T13:24:20.54 3.0 undecidable manual Pg 4.38 0
IV.EMSG.HHZ. 2021-01-18T13:24:20.28 3.0 positive manual Pg 3.81 0
IV.EMCN.HNZ. 2021-01-18T13:24:20.72 3.0 positive manual Pg 3.6 0
IV.ECTS.HHZ. 2021-01-18T13:24:19.96 3.0 undecidable manual Pg 3.76 0
IV.CMDO.HHZ. 2021-01-18T13:24:08.81 3.0 positive manual Pn -9.99 0
OT.TAR1.HHZ. 2021-01-18T13:24:08.62 3.0 positive manual Pg 10.17 0
IV.APRC.HHZ. 2021-01-18T13:23:59.10 3.0 undecidable manual Sn -2.86 0
IV.LRP.EHZ. 2021-01-18T13:23:32.31 3.0 undecidable manual Sn -8.66 0
IV.VVLD.HHZ. 2021-01-18T13:23:30.44 3.0 undecidable manual S -5.73 0
IV.MOMA.HHZ. 2021-01-18T13:23:08.12 0.3 undecidable manual S 296 35.2425 93 0.16 71
IV.RM33.EHZ. 2021-01-18T13:23:05.78 0.3 undecidable manual S 129 27.0507 95 0 74
IV.NRCA.HHZ. 2021-01-18T13:23:04.39 0.3 undecidable manual S 34 22.6551 98 -0.21 72
IV.ARRO.EHZ. 2021-01-18T13:23:03.21 0.3 undecidable manual S 239 18.3705 103 -0.28 72
IV.MOMA.HHZ. 2021-01-18T13:23:02.98 0.1 undecidable manual P 296 35.2425 93 0.04 97
IV.NRCA.HHZ. 2021-01-18T13:23:01.00 0.1 undecidable manual P 34 22.6551 98 0 100
IV.LNSS.HHZ. 2021-01-18T13:23:01.37 0.3 undecidable manual S 136 9.4794 130 0.01 76
IV.RM33.EHZ. 2021-01-18T13:23:01.68 0.1 undecidable manual P 129 27.0507 95 0 99
IV.ARRO.EHZ. 2021-01-18T13:23:00.42 0.1 undecidable manual P 239 18.3705 103 0.07 99
IV.LNSS.HHZ. 2021-01-18T13:22:59.35 0.3 undecidable manual P 136 9.4794 130 0.23 73
IV.ARVD.HHZ. 2021-01-18T13:22:58.83 3.0 negative manual P -9.85 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.1 0.00007446935 0.1216 AML other m 2021-01-18T13:23:05.22
IV.NRCA.HHN. ML:0.9 0.0000516 1.16 AML other m 2021-01-18T13:23:05.03
IV.ARVD.HHE. ML:1.1 0.000015359530000000003 0.0576 AML other m 2021-01-18T13:22:59.23
IV.ARVD.HHN. ML:1.0 0.0000099848644 0.0576 AML other m 2021-01-18T13:22:59.14
IV.LNSS.HHE. ML:1.5 0.00039093054999999997 0.1152 AML other m 2021-01-18T13:23:01.84
IV.LNSS.HHN. ML:1.3 0.00024813715 0.1216 AML other m 2021-01-18T13:23:01.78
IV.LNSS.HNE. ML:1.5 0.00034225065 0.1152 AML other m 2021-01-18T13:23:01.84
IV.LNSS.HNN. ML:1.4 0.0002758717 0.1216 AML other m 2021-01-18T13:23:01.78
IV.ARRO.EHE. ML:1.1 0.00010150374500000001 0.16 AML other m 2021-01-18T13:23:03.62
IV.ARRO.EHN. ML:1.0 0.00006990125499999999 0.1856 AML other m 2021-01-18T13:23:03.65
IV.NRCA.HNE. ML:1.2 0.000103311475 0.192 AML other m 2021-01-18T13:23:04.75
IV.NRCA.HNN. ML:1.5 0.000185193 0.64 AML other m 2021-01-18T13:23:03.25
IV.RM33.EHE. ML:1.0 0.000054296159999999994 0.2368 AML other m 2021-01-18T13:23:07.22
IV.RM33.EHN. ML:1.1 0.000059188274999999995 0.2624 AML other m 2021-01-18T13:23:06.03
IV.RM33.HNE. ML:1.4 0.00012600064 0.7104 AML other m 2021-01-18T13:23:13.45
IV.RM33.HNN. ML:1.3 0.0000988113335 0.4352 AML other m 2021-01-18T13:23:08.22
IV.MOMA.HHE. ML:1.0 0.000036215844999999996 0.1792 AML other m 2021-01-18T13:23:08.70
IV.MOMA.HHN. ML:0.9 0.00002921291 0.2176 AML other m 2021-01-18T13:23:08.91
IV.MOMA.HNE. ML:1.6 0.00017324859999999997 1.0368 AML other m 2021-01-18T13:23:16.79
IV.MOMA.HNN. ML:1.5 0.00012968362 0.6208 AML other m 2021-01-18T13:23:02.44
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