Earthquake with magnitude of ML 1.2 on date 27-01-2021 and time 12:15:18 (Italy) in region 5 km NW Montefranco (TR)

A magnitude ML 1.2 earthquake occured in region: 5 km NW Montefranco (TR), on

  • 27-01-2021 11:15:18 (UTC)
  • 27-01-2021 12:15:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.63, 12.73 at 15 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Montefranco TR 5 1276 1276
Ferentillo TR 5 1913 3189
Arrone TR 6 2763 5952
Terni TR 10 111501 117453
Polino TR 11 233 117686
Spoleto PG 12 38218 155904
Labro RI 13 374 156278
Scheggino PG 13 461 156739
Morro Reatino RI 14 373 157112
San Gemini TR 15 5018 162130
Colli sul Velino RI 15 533 162663
Stroncone TR 15 4917 167580
Sant'Anatolia di Narco PG 15 564 168144
Rivodutri RI 16 1253 169397
Acquasparta TR 16 4778 174175
Monteleone di Spoleto PG 19 599 174774
Poggio Bustone RI 19 2055 176829
Greccio RI 19 1558 178387
Vallo di Nera PG 20 364 178751
Poggiodomo PG 20 117 178868
Montecastrilli TR 20 5022 183890

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km NE of Terni (111501 inhabitants)
37 Km S of Foligno (57155 inhabitants)
56 Km E of Viterbo (67173 inhabitants)
60 Km SE of Perugia (166134 inhabitants)
63 Km W of L'Aquila (69753 inhabitants)
70 Km N of Guidonia Montecelio (88673 inhabitants)
74 Km N of Tivoli (56533 inhabitants)
80 Km W of Teramo (54892 inhabitants)
84 Km N of Roma (2864731 inhabitants)
97 Km NE of Civitavecchia (52991 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.2 2021-01-27
11:15:18
42.63 12.73 15 2021-01-27
11:22:06
Sala Sismica INGV-Roma 86630061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-27 11:15:18 ± 0.26
Latitude 42.63 ± 0.01
Longitude 12.73 ± 0.01
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86630061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 830
Semi-minor axis of confidence ellipse (meter) 324
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 183
Circular confidence region, given by single value of horizontal uncertainty (meter) 830
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.05486
Epicentral distance of station farthest from the epicenter (degree) 0.23203
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 12
Type of magnitude ML
Reference to an origin 86630061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-27 11:22:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.LNSS.HHZ. 2021-01-27T11:15:27.84 0.6 undecidable manual S 96 0.232 105 -0.06 50
IV.MOMA.HHZ. 2021-01-27T11:15:27.45 0.6 undecidable manual S 327 0.2113 108 0.13 49
IV.GAVE.EHZ. 2021-01-27T11:15:25.40 0.6 undecidable manual S 62 0.1394 122 0.01 51
IV.CESX.HHZ. 2021-01-27T11:15:24.40 0.6 undecidable manual S 260 0.1043 133 -0.15 50
IV.MOMA.HHZ. 2021-01-27T11:15:23.60 1.0 positive manual P 327 0.2113 108 0.04 25
IV.LNSS.HHZ. 2021-01-27T11:15:23.79 0.3 negative manual P 96 0.232 105 -0.11 74
IV.GAVE.EHZ. 2021-01-27T11:15:22.41 0.3 undecidable manual P 62 0.1394 122 -0.04 76
IV.CESX.HHZ. 2021-01-27T11:15:21.84 0.1 negative manual P 260 0.1043 133 -0.13 100
IV.ARRO.EHE. 2021-01-27T11:15:21.71 0.1 undecidable manual P 149 0.0549 152 0.26 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:1.1 0.0001206 0.16 AML other m 2021-01-27T11:15:24.63
IV.CESX.HHE. ML:1.1 0.000124 0.28 AML other m 2021-01-27T11:15:24.66
IV.MOMA.HHN. ML:1.1 6.89E-5 1.36 AML other m 2021-01-27T11:15:27.79
IV.MOMA.HHE. ML:1 5.6353875E-5 0.2432 AML other m 2021-01-27T11:15:28.82
IV.LNSS.HHE. ML:1.1 5.93385E-5 0.1408 AML other m 2021-01-27T11:15:28.19
IV.LNSS.HHN. ML:1.2 8.039767E-5 0.1792 AML other m 2021-01-27T11:15:28.90
IV.GAVE.EHE. ML:1.2 0.00012707545 0.0832 AML other m 2021-01-27T11:15:25.67
IV.GAVE.EHN. ML:1.4 0.00017644975 0.1024 AML other m 2021-01-27T11:15:25.65
IV.GAVE.HNE. ML:1.3 0.00014458495 0.1024 AML other m 2021-01-27T11:15:25.66
IV.GAVE.HNN. ML:1.2 0.000123178655 0.768 AML other m 2021-01-27T11:15:23.18
IV.MOMA.HNE. ML:1.3 0.00011242676 0.6848 AML other m 2021-01-27T11:15:33.21
IV.MOMA.HNN. ML:1.3 0.00012360105 0.5568 AML other m 2021-01-27T11:15:32.27
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download