Earthquake with magnitude of ML 2.0 on date 06-01-2021 and time 14:03:49 (UTC) in region 2 km S San Gemini (TR)

A magnitude ML 2.0 earthquake occured in region: 2 km S San Gemini (TR), on

  • 06-01-2021 14:03:49 (UTC)
  • 06-01-2021 15:03:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.5980, 12.5440 at 9 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
San Gemini TR 2 5018 5018
Montecastrilli TR 7 5022 10040
Narni TR 9 19785 29825
Terni TR 9 111501 141326
Acquasparta TR 10 4778 146104
Avigliano Umbro TR 11 2558 148662
Amelia TR 12 11897 160559
Stroncone TR 15 4917 165476
Lugnano in Teverina TR 18 1494 166970
Montefranco TR 18 1276 168246
Arrone TR 19 2763 171009
Penna in Teverina TR 19 1099 172108
Orte VT 20 8923 181031
Massa Martana PG 20 3770 184801
Otricoli TR 20 1869 186670

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km W of Terni (111501 inhabitants)
41 Km E of Viterbo (67173 inhabitants)
42 Km SW of Foligno (57155 inhabitants)
58 Km S of Perugia (166134 inhabitants)
68 Km N of Guidonia Montecelio (88673 inhabitants)
74 Km N of Tivoli (56533 inhabitants)
75 Km W of L'Aquila (69753 inhabitants)
78 Km N of Roma (2864731 inhabitants)
83 Km NE of Civitavecchia (52991 inhabitants)
95 Km N of Fiumicino (78395 inhabitants)
95 Km W of Teramo (54892 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 2.0 2021-01-06
14:03:49
42.5977 12.5443 9 2021-07-12
16:54:58
Bollettino Sismico Italiano INGV 87080011
Reviewed
Rev100
ML 1.9 2021-01-06
14:03:49
42.5913 12.541 8 2021-01-06
14:13:51
Sala Sismica INGV-Roma 86048011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-06 14:03:49 ± 0.07
Latitude 42.5977 ± 0.0027
Longitude 12.5443 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87080011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 417
Semi-minor axis of confidence ellipse (meter) 312
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 75
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.03327
Epicentral distance of station farthest from the epicenter (degree) 0.69158
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 86048011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-06 14:13:51

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 87080011
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-02 11:28:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BARO.HNE. 2021-01-06T14:04:07.62 0.3 undecidable manual S 226 0.5045 50 0.1 68
IV.CESI.HHZ. 2021-01-06T14:04:07.57 0.6 undecidable manual S 33 0.4847 50 0.63 40
IV.MGAB.HHZ. 2021-01-06T14:04:06.30 0.6 undecidable manual S 315 0.4470 50 0.49 42
IT.FOPC.HGZ. 2021-01-06T14:04:04.10 0.6 undecidable manual S 17 0.3894 50 -0.01 47
IT.MMP1.HGE. 2021-01-06T14:04:04.11 0.6 undecidable manual S 157 0.3795 50 0.3 44
IV.SRES.HHZ. 2021-01-06T14:04:03.34 0.6 undecidable manual S 184 0.3615 50 0.06 47
IV.LNSS.HHZ. 2021-01-06T14:04:03.44 0.3 undecidable manual S 89 0.3651 50 0.06 70
IV.CSP1.EHZ. 2021-01-06T14:04:02.87 0.3 undecidable manual P 44 0.6916 50 -0.25 63
IV.MURB.HHZ. 2021-01-06T14:04:02.86 0.6 undecidable manual P 359 0.6646 50 0.19 43
IV.MMO1.EHZ. 2021-01-06T14:04:02.26 0.3 undecidable manual P 62 0.6484 50 -0.13 65
IV.FDMO.HHZ. 2021-01-06T14:04:01.06 0.1 undecidable manual P 42 0.5918 50 -0.37 84
IV.MC2.EHZ. 2021-01-06T14:04:01.28 0.6 undecidable manual P 56 0.5675 50 0.28 43
IV.FIAM.HHN. 2021-01-06T14:04:00.43 0.6 undecidable manual P 128 0.5360 50 -0.03 45
IV.CESI.HHZ. 2021-01-06T14:03:59.56 0.1 undecidable manual P 33 0.4847 50 -0.04 92
IV.MGAB.HHZ. 2021-01-06T14:03:59.00 0.3 undecidable manual P 315 0.4470 50 0.06 69
IV.BARO.HNE. 2021-01-06T14:03:59.52 0.3 undecidable manual P 226 0.5045 50 -0.41 63
IT.MMP1.HGE. 2021-01-06T14:03:58.03 1.0 undecidable manual P 157 0.3795 50 0.25 22
IT.GNU.HGZ. 2021-01-06T14:03:57.83 0.3 undecidable manual S 5 0.2068 110 -0.23 70
IV.SRES.HHZ. 2021-01-06T14:03:57.18 0.6 undecidable manual P 184 0.3615 50 -0.3 45
IV.LNSS.HHZ. 2021-01-06T14:03:57.24 0.3 undecidable manual P 89 0.3651 50 -0.3 67
IV.MOMA.HHZ. 2021-01-06T14:03:57.92 0.3 undecidable manual S 5 0.2068 110 -0.14 71
IT.FOPC.HGZ. 2021-01-06T14:03:57.73 0.6 undecidable manual P 17 0.3894 50 -0.23 45
IV.ARRO.EHZ. 2021-01-06T14:03:56.63 0.3 undecidable manual S 96 0.1637 115 0.1 72
IV.MOMA.HHZ. 2021-01-06T14:03:54.48 0.1 negative manual P 5 0.2068 110 0.01 97
IT.GNU.HGZ. 2021-01-06T14:03:54.88 0.3 undecidable manual P 5 0.2068 110 0.41 67
IV.ARRO.EHZ. 2021-01-06T14:03:53.72 0.3 undecidable manual P 96 0.1637 115 0.14 72
IV.CESX.HHZ. 2021-01-06T14:03:52.93 0.3 undecidable manual S 71 0.0333 157 0.14 73
IV.CESX.HHZ. 2021-01-06T14:03:51.38 0.1 positive manual P 71 0.0333 157 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:0.0 0.002195179 0.2048 AML other m 2021-01-06T14:03:53.32
IV.CESX.HHE. ML:0.0 0.00127720585 0.4032 AML other m 2021-01-06T14:03:54.60
IV.ARRO.EHE. ML:0.0 0.00068700305 0.16 AML other m 2021-01-06T14:03:57.57
IV.ARRO.EHN. ML:0.0 0.0006627262 0.256 AML other m 2021-01-06T14:03:57.86
IV.MOMA.HHE. ML:1.8 0.00041700000000000005 0.18 AML other m 2021-01-06T14:03:59.37
IV.MOMA.HNE. ML:1.8 0.000372 0.18 AML other m 2021-01-06T14:03:59.47
IV.MOMA.HHN. ML:1.8 0.00042912895000000003 0.3392 AML other m 2021-01-06T14:04:00.09
IV.MOMA.HNN. ML:1.8 0.00046350000000000004 0.68 AML other m 2021-01-06T14:04:00.10
IV.LNSS.HHN. ML:2.0 0.0003795 0.16 AML other m 2021-01-06T14:04:03.90
IV.LNSS.HHE. ML:2.1 0.00039749999999999996 0.12 AML other m 2021-01-06T14:04:04.95
IV.MURB.HNE. ML:2.1 0.00020676925000000002 0.2368 AML other m 2021-01-06T14:04:07.54
IV.CESI.HHN. ML:1.8 0.00015899999999999996 0.2 AML other m 2021-01-06T14:04:08.10
IV.CESI.HNN. ML:2.0 0.00023876544999999999 1.3024 AML other m 2021-01-06T14:04:08.75
IV.LNSS.HNE. ML:2.3 0.00069600815 1.1808 AML other m 2021-01-06T14:04:08.36
IV.CESI.HHE. ML:1.6 0.00009279999999999999 0.68 AML other m 2021-01-06T14:04:09.99
IV.LNSS.HNN. ML:2.2 0.0005298411950000001 0.8704 AML other m 2021-01-06T14:04:10.63
IV.FDMO.HHE. ML:1.6 0.000062574285 0.2944 AML other m 2021-01-06T14:04:10.99
IV.FDMO.HHN. ML:1.5 0.00005387865 0.1408 AML other m 2021-01-06T14:04:12.25
IV.CESI.HNE. ML:1.8 0.0001695855 0.768 AML other m 2021-01-06T14:04:12.71
IV.CSP1.EHE. ML:2.3 0.000286 0.4 AML other m 2021-01-06T14:04:14.62
IV.MURB.HHN. ML:0.0 0.0001275 0.9 AML other m 2021-01-06T14:04:15.69
IV.CSP1.EHN. ML:2.2 0.00024041925000000002 0.5376 AML other m 2021-01-06T14:04:14.71
IV.MURB.HHE. ML:0.0 0.0001973104 1.52 AML other m 2021-01-06T14:04:15.94
IV.MURB.HNN. ML:2.0 0.00016263675 1.2576 AML other m 2021-01-06T14:04:19.04
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download