Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 08-01-2021 and time 21:37:39 (UTC) in region 3 km NE Monteleone di Spoleto (PG)

A magnitude ML 1.4 earthquake occured in region: 3 km NE Monteleone di Spoleto (PG), on

  • 08-01-2021 21:37:39 (UTC)
  • 08-01-2021 22:37:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6730, 12.9780 at 10 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.

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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 3 599 599
Poggiodomo PG 6 117 716
Cascia PG 6 3217 3933
Leonessa RI 12 2435 6368
Scheggino PG 13 461 6829
Sant'Anatolia di Narco PG 13 564 7393
Vallo di Nera PG 14 364 7757
Polino TR 15 233 7990
Cittareale RI 16 482 8472
Ferentillo TR 16 1913 10385
Norcia PG 16 4957 15342
Cerreto di Spoleto PG 17 1075 16417
Montefranco TR 19 1276 17693
Posta RI 19 694 18387
Arrone TR 20 2763 21150
Rivodutri RI 20 1253 22403

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km E of Terni (111501 inhabitants)
39 Km SE of Foligno (57155 inhabitants)
50 Km NW of L'Aquila (69753 inhabitants)
60 Km W of Teramo (54892 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
77 Km E of Viterbo (67173 inhabitants)
78 Km N of Guidonia Montecelio (88673 inhabitants)
80 Km N of Tivoli (56533 inhabitants)
96 Km NE of Roma (2864731 inhabitants)
98 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
Bulletin
Rev1000 		ML 1.4 2021-01-08
21:37:39		 42.6733 12.9777 10 2021-07-12
16:55:00		 Bollettino Sismico Italiano INGV 87628311
Reviewed
Rev100 		ML 1.4 2021-01-08
21:37:39		 42.6773 12.971 10 2021-01-08
21:42:42		 Sala Sismica INGV-Roma 86106711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-08 21:37:39 ± 0.04
Latitude 42.6733 ± 0.0027
Longitude 12.9777 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87628311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 295
Semi-minor axis of confidence ellipse (meter) 246
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 180
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.08454
Epicentral distance of station farthest from the epicenter (degree) 0.47304
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 86106711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-08 21:42:42

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 87628311
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-02 13:42:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2021-01-08T21:37:55.48 0.6 undecidable manual S 96 51.4152 50 -0.43 43
IV.FDMO.HHZ. 2021-01-08T21:37:53.13 0.6 undecidable manual S 12 41.2254 50 -0.06 48
IV.CAMP.HHE. 2021-01-08T21:37:52.32 0.6 undecidable manual S 113 38.4282 50 -0.11 48
IV.MMO1.EHZ. 2021-01-08T21:37:52.29 0.3 undecidable manual S 48 37.9287 50 -0.01 73
IV.MOMA.HHZ. 2021-01-08T21:37:52.05 0.6 undecidable manual S 294 36.2415 50 0.2 47
IV.MTRA.EHE. 2021-01-08T21:37:51.76 0.6 undecidable manual S 75 35.3424 50 0.14 48
IV.CESI.HHZ. 2021-01-08T21:37:51.97 0.6 undecidable manual S 351 37.2294 50 -0.16 47
IV.SMA1.EHZ. 2021-01-08T21:37:50.21 0.3 undecidable manual S 99 29.5482 50 0.14 72
IV.CESX.HHZ. 2021-01-08T21:37:50.59 0.6 undecidable manual S 257 32.745 50 -0.31 46
IV.MC2.EHZ. 2021-01-08T21:37:50.89 0.6 undecidable manual S 33 31.5462 50 0.3 46
IV.MF5.EHZ. 2021-01-08T21:37:49.61 0.3 undecidable manual P 48 52.503 50 0.49 64
IV.GUMA.HHZ. 2021-01-08T21:37:49.35 0.3 undecidable manual P 34 52.1034 50 0.29 67
IV.CSP1.EHZ. 2021-01-08T21:37:48.71 0.3 undecidable manual P 22 50.0166 50 -0.02 71
IV.ASSB.HHZ. 2021-01-08T21:37:48.56 0.3 undecidable manual P 328 48.5181 50 0.06 71
IV.FIAM.HHZ. 2021-01-08T21:37:48.36 0.3 undecidable manual P 166 46.4202 50 0.18 69
IV.TERO.HHZ. 2021-01-08T21:37:48.57 0.3 undecidable manual P 96 51.4152 50 -0.39 66
IV.T1299.HNN. 2021-01-08T21:37:48.80 0.6 undecidable manual S 100 25.2525 111 -0.08 49
IV.NRCA.HHZ. 2021-01-08T21:37:47.37 0.6 undecidable manual S 32 20.9679 115 -0.15 49
IV.FDMO.HHZ. 2021-01-08T21:37:47.27 0.3 undecidable manual P 12 41.2254 50 -0.12 71
IV.ARRO.EHZ. 2021-01-08T21:37:47.02 0.3 undecidable manual S 239 20.1687 116 -0.26 71
IV.MMO1.EHZ. 2021-01-08T21:37:46.76 0.1 undecidable manual P 48 37.9287 50 -0.12 95
IV.MOMA.HHZ. 2021-01-08T21:37:46.51 0.1 undecidable manual P 294 36.2415 50 -0.11 96
IV.MTRA.EHE. 2021-01-08T21:37:46.47 0.3 undecidable manual P 75 35.3424 50 -0.02 73
IV.CESI.HHZ. 2021-01-08T21:37:46.62 0.3 undecidable manual P 351 37.2294 50 -0.16 71
IV.CESX.HHZ. 2021-01-08T21:37:46.55 0.3 undecidable manual P 257 32.745 50 0.47 67
IV.CAMP.HHE. 2021-01-08T21:37:46.79 0.1 undecidable manual P 113 38.4282 50 -0.16 94
IV.MC2.EHZ. 2021-01-08T21:37:45.90 0.1 undecidable manual P 33 31.5462 50 0.01 98
IV.SMA1.EHZ. 2021-01-08T21:37:45.63 0.1 undecidable manual P 99 29.5482 50 0.04 98
IV.T1299.HNN. 2021-01-08T21:37:44.91 0.1 undecidable manual P 100 25.2525 111 0.01 99
IV.ARRO.EHZ. 2021-01-08T21:37:44.02 0.1 undecidable manual P 239 20.1687 116 0.04 100
IV.NRCA.HHZ. 2021-01-08T21:37:44.10 0.1 negative manual P 32 20.9679 115 -0.02 100
IV.LNSS.HHZ. 2021-01-08T21:37:44.20 0.3 undecidable manual S 147 9.3795 137 0 77
IV.LNSS.HHZ. 2021-01-08T21:37:42.47 0.1 undecidable manual P 147 9.3795 137 0.27 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.5 0.00040800000000000005 0.36 AML other m 2021-01-08T21:37:44.50
IV.LNSS.HHN. ML:1.3 0.00028000000000000003 0.78 AML other m 2021-01-08T21:37:45.64
IV.ARRO.EHN. ML:1.2 0.000104 1.06 AML other m 2021-01-08T21:37:47.89
IV.NRCA.HHN. ML:1.6 0.00028100000000000005 0.74 AML other m 2021-01-08T21:37:47.56
IV.NRCA.HHE. ML:1.8 0.0004615 0.16 AML other m 2021-01-08T21:37:47.62
IV.ARRO.EHE. ML:1.2 0.00011654999999999999 0.8 AML other m 2021-01-08T21:37:48.61
IV.SMA1.EHE. ML:1.7 0.0002375 0.3 AML other m 2021-01-08T21:37:50.52
IV.SMA1.EHN. ML:1.4 0.0001265 0.5 AML other m 2021-01-08T21:37:51.50
IV.MOMA.HHE. ML:1.3 0.00008415 1.08 AML other m 2021-01-08T21:37:53.09
IV.FDMO.HHE. ML:1.2 0.00004765 0.74 AML other m 2021-01-08T21:37:53.93
IV.FDMO.HHN. ML:1.1 0.000045249999999999995 0.42 AML other m 2021-01-08T21:37:54.44
IV.MOMA.HHN. ML:1.2 0.00006345 0.8 AML other m 2021-01-08T21:37:54.50
IV.GUMA.HNE. ML:2.0 0.000254 0.94 AML other m 2021-01-08T21:38:00.15
IV.GUMA.HNN. ML:3.0 0.002206 0.7 AML other m 2021-01-08T21:38:09.43
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