Earthquake with magnitude of ML 1.7 on date 22-10-2020 and time 15:02:53 (UTC) in region 2 km NE Montecastrilli (TR)

A magnitude ML 1.7 earthquake occured in region: 2 km NE Montecastrilli (TR), on

  • 22-10-2020 15:02:53 (UTC)
  • 22-10-2020 17:02:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.66, 12.51 at 8 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
Montecastrilli TR 3 5022 5022
Acquasparta TR 4 4778 9800
San Gemini TR 6 5018 14818
Avigliano Umbro TR 7 2558 17376
Massa Martana PG 13 3770 21146
Amelia TR 14 11897 33043
Todi PG 16 16851 49894
Terni TR 16 111501 161395
Narni TR 16 19785 181180
Lugnano in Teverina TR 18 1494 182674
Guardea TR 18 1836 184510
Montecchio TR 18 1676 186186
Alviano TR 20 1463 187649
Giano dell'Umbria PG 20 3846 191495

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NW of Terni (111501 inhabitants)
36 Km SW of Foligno (57155 inhabitants)
43 Km NE of Viterbo (67173 inhabitants)
50 Km S of Perugia (166134 inhabitants)
76 Km N of Guidonia Montecelio (88673 inhabitants)
81 Km W of L'Aquila (69753 inhabitants)
81 Km N of Tivoli (56533 inhabitants)
86 Km N of Roma (2864731 inhabitants)
87 Km NE of Civitavecchia (52991 inhabitants)
98 Km W of Teramo (54892 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 1.7 2020-10-22
15:02:53
42.66 12.51 8 2021-02-26
14:56:19
Bollettino Sismico Italiano INGV 87140361
Reviewed
Rev100
ML 1.6 2020-10-22
15:02:53
42.66 12.52 8 2020-10-22
15:17:32
Sala Sismica INGV-Roma 84030001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-22 15:02:53 ± 0.1
Latitude 42.66 ± 0.00
Longitude 12.51 ± 0.01
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87140361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 569
Semi-minor axis of confidence ellipse (meter) 259
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 223
Circular confidence region, given by single value of horizontal uncertainty (meter) 570
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 174
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
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) 0.07824
Epicentral distance of station farthest from the epicenter (degree) 0.60524
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 84030001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-22 15:17:32

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 23
Type of magnitude ML
Reference to an origin 87140361
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-14 09:22:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SMA1.EHZ. 2020-10-22T15:03:14.69 0.3 undecidable manual S 93 0.6052 50 0.5 65
IV.RM33.EHZ. 2020-10-22T15:03:12.42 0.6 undecidable manual S 107 0.5396 50 0.19 47
IV.MC2.EHZ. 2020-10-22T15:03:12.87 0.6 undecidable manual S 63 0.554 50 0.21 47
IV.CESI.HHZ. 2020-10-22T15:03:09.66 0.6 undecidable manual S 40 0.4452 50 0.22 48
IV.NRCA.HHZ. 2020-10-22T15:03:09.96 0.6 undecidable manual S 69 0.473 50 -0.29 47
IV.LNSS.HHZ. 2020-10-22T15:03:08.20 0.6 undecidable manual S 99 0.393 50 0.31 47
IV.ASSB.HHZ. 2020-10-22T15:03:07.58 0.3 undecidable manual S 16 0.3921 50 -0.31 71
IV.MGAB.HHN. 2020-10-22T15:03:07.84 0.3 undecidable manual S 310 0.384 50 0.2 73
IV.SMA1.EHZ. 2020-10-22T15:03:05.37 0.6 positive manual P 93 0.6052 50 0.05 48
IV.MC2.EHZ. 2020-10-22T15:03:04.40 0.6 undecidable manual P 63 0.554 50 -0.04 48
IV.GAVE.HNZ. 2020-10-22T15:03:04.52 0.3 undecidable manual S 84 0.2815 105 0.08 76
IV.RM33.EHZ. 2020-10-22T15:03:03.84 0.6 positive manual P 107 0.5396 50 -0.35 46
IV.CESI.HHZ. 2020-10-22T15:03:02.41 0.6 undecidable manual P 40 0.4452 50 -0.17 48
IV.NRCA.HHZ. 2020-10-22T15:03:02.67 0.6 negative manual P 69 0.473 50 -0.38 46
IV.LNSS.HHZ. 2020-10-22T15:03:01.40 0.6 positive manual P 99 0.393 50 -0.28 48
IV.MGAB.HHN. 2020-10-22T15:03:01.61 0.1 undecidable manual P 310 0.384 50 0.07 100
IV.ARRO.EHZ. 2020-10-22T15:03:01.76 0.6 undecidable manual S 115 0.205 110 0.15 51
IV.ASSB.HHZ. 2020-10-22T15:03:01.40 0.3 undecidable manual P 16 0.3921 50 -0.28 71
IV.GAVE.HNZ. 2020-10-22T15:02:59.25 0.1 undecidable manual P 84 0.2815 105 -0.44 94
IT.GNU.HGN. 2020-10-22T15:02:59.68 0.6 undecidable manual S 17 0.1457 118 0.17 51
IV.MOMA.HHZ. 2020-10-22T15:02:59.52 0.6 undecidable manual S 17 0.1457 118 0 53
IV.ARRO.EHZ. 2020-10-22T15:02:58.00 0.6 negative manual P 115 0.205 110 -0.06 52
IT.GNU.HGN. 2020-10-22T15:02:57.12 0.1 undecidable manual P 17 0.1457 118 0.28 100
IV.CESX.HHZ. 2020-10-22T15:02:57.32 0.6 undecidable manual S 136 0.0782 134 -0.08 53
IV.MOMA.HHZ. 2020-10-22T15:02:56.90 0.6 undecidable manual P 17 0.1457 118 0.05 52
IV.CESX.HHZ. 2020-10-22T15:02:55.73 0.3 negative manual P 136 0.0782 134 0.11 79
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:1.9 0.00134 0.16 AML other m 2020-10-22T15:02:57.58
IV.CESX.HHE. ML:1.9 0.0011935 0.2 AML other m 2020-10-22T15:02:58.18
IV.MOMA.HHN. ML:1.8 0.000582 0.7 AML other m 2020-10-22T15:03:00.38
IV.MOMA.HHE. ML:1.7 0.000515 0.34 AML other m 2020-10-22T15:03:00.81
IV.ARRO.EHE. ML:1.6 0.000269 0.36 AML other m 2020-10-22T15:03:01.71
IV.ARRO.EHN. ML:1.7 0.0003105 0.22 AML other m 2020-10-22T15:03:03.32
IV.LNSS.HHN. ML:1.6 0.000136 0.52 AML other m 2020-10-22T15:03:08.44
IV.ASSB.HHE. ML:1.2 4.91E-5 0.52 AML other m 2020-10-22T15:03:08.45
IV.LNSS.HHE. ML:1.7 0.0001655 0.12 AML other m 2020-10-22T15:03:09.79
IV.CESI.HHE. ML:1.4 5.825E-5 1.24 AML other m 2020-10-22T15:03:10.15
IV.APEC.HHE. ML:1.8 6.79E-5 0.08 AML other m 2020-10-22T15:03:10.12
IV.ASSB.HHN. ML:1.2 4.84E-5 1.16 AML other m 2020-10-22T15:03:10.78
IV.CESI.HHN. ML:1.4 6.4E-5 0.22 AML other m 2020-10-22T15:03:10.72
IV.NRCA.HHN. ML:1.6 9.68E-5 0.14 AML other m 2020-10-22T15:03:10.93
IV.APEC.HHN. ML:1.8 6.305E-5 0.74 AML other m 2020-10-22T15:03:12.59
IV.RM33.EHN. ML:1.5 6.76E-5 0.24 AML other m 2020-10-22T15:03:13.12
IV.NRCA.HHE. ML:1.5 8.01E-5 0.76 AML other m 2020-10-22T15:03:13.27
IV.RM33.EHE. ML:1.5 6.09E-5 0.22 AML other m 2020-10-22T15:03:14.41
IV.SMA1.EHE. ML:1.8 0.0001144 0.84 AML other m 2020-10-22T15:03:15.42
IV.SMA1.EHN. ML:1.9 0.0001465 0.28 AML other m 2020-10-22T15:03:15.49
IV.SEI.HHE. ML:3.6 0.00147 0.08 AML other m 2020-10-22T15:03:39.55
IV.SEI.HHN. ML:3.4 0.001018 0.68 AML other m 2020-10-22T15:03:39.55
IV.VIVA.HHE. ML:3.8 0.005865 0.22 AML other m 2020-10-22T15:03:42.18
IV.VIVA.HHN. ML:0 0.00291 0.18 AML other m 2020-10-22T15:04:01.83
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