Earthquake with magnitude of ML 1.3 on date 04-07-2020 and time 08:04:35 (Italy) in region 2 km W Montecastrilli (TR)

A magnitude ML 1.3 earthquake occured in region: 2 km W Montecastrilli (TR), on

  • 04-07-2020 06:04:35 (UTC)
  • 04-07-2020 08:04:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.64, 12.46 at 9 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
Montecastrilli TR 2 5022 5022
Avigliano Umbro TR 3 2558 7580
San Gemini TR 8 5018 12598
Acquasparta TR 9 4778 17376
Amelia TR 10 11897 29273
Lugnano in Teverina TR 13 1494 30767
Guardea TR 14 1836 32603
Narni TR 14 19785 52388
Montecchio TR 14 1676 54064
Alviano TR 15 1463 55527
Massa Martana PG 16 3770 59297
Todi PG 16 16851 76148
Terni TR 18 111501 187649
Giove TR 18 1928 189577
Penna in Teverina TR 19 1099 190676
Attigliano TR 20 2028 192704

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km NW of Terni (111501 inhabitants)
38 Km NE of Viterbo (67173 inhabitants)
40 Km SW of Foligno (57155 inhabitants)
52 Km S of Perugia (166134 inhabitants)
74 Km N of Guidonia Montecelio (88673 inhabitants)
80 Km NW of Tivoli (56533 inhabitants)
82 Km NE of Civitavecchia (52991 inhabitants)
83 Km N of Roma (2864731 inhabitants)
83 Km W of L'Aquila (69753 inhabitants)
98 Km N of Fiumicino (78395 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 1.3 2020-07-04
06:04:35
42.64 12.46 9 2020-07-04
06:29:40
Sala Sismica INGV-Roma 80762281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-04 06:04:35 ± 0.21
Latitude 42.64 ± 0.01
Longitude 12.46 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 80762281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1106
Semi-minor axis of confidence ellipse (meter) 848
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 198
Circular confidence region, given by single value of horizontal uncertainty (meter) 1110
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 187
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.83097
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 80762281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-04 06:29:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NDIM.HHZ. 2020-07-04T06:05:48.62 3.0 undecidable manual Sg 0.7 0
IV.FERS.HNZ. 2020-07-04T06:05:37.02 3.0 undecidable manual Sn -7.42 0
IV.VENT.EHZ. 2020-07-04T06:05:26.07 3.0 undecidable manual Sn 0.72 0
IV.SEI.HHZ. 2020-07-04T06:05:20.76 3.0 undecidable manual Sn -5.36 0
IV.EL6.EHZ. 2020-07-04T06:05:03.77 0.6 undecidable manual S 34 0.831 50 0.41 44
IV.FDMO.HHZ. 2020-07-04T06:04:56.70 0.3 undecidable manual S 49 0.6043 50 0.06 74
IV.ATCC.EHE. 2020-07-04T06:04:56.17 0.6 undecidable manual S 13 0.5594 50 0.88 39
IV.SACS.HNE. 2020-07-04T06:04:52.65 0.6 undecidable manual S 297 0.456 50 0.41 47
IV.EL6.EHZ. 2020-07-04T06:04:51.90 0.6 undecidable manual P 34 0.831 50 0.21 45
IV.GIUL.HHZ. 2020-07-04T06:04:51.87 3.0 undecidable manual P -0.07 0
IV.ASSB.HHE. 2020-07-04T06:04:51.15 0.6 undecidable manual S 20 0.4263 50 -0.2 50
IV.GAVE.EHZ. 2020-07-04T06:04:48.00 0.3 undecidable manual S 81 0.3211 50 -0.23 75
IV.ATCC.EHE. 2020-07-04T06:04:47.23 0.3 undecidable manual P 13 0.5594 50 0.2 72
IV.FDMO.HHZ. 2020-07-04T06:04:47.43 1.0 negative manual P 49 0.6043 50 -0.38 23
IV.ATTE.HNN. 2020-07-04T06:04:47.11 0.6 undecidable manual P 352 0.5621 50 0.03 50
IV.SACS.HNE. 2020-07-04T06:04:45.00 0.6 undecidable manual P 297 0.456 50 -0.27 49
IV.ASSB.HHE. 2020-07-04T06:04:44.37 0.6 undecidable manual P 20 0.4263 50 -0.39 48
IV.MOMA.HHZ. 2020-07-04T06:04:43.30 0.3 undecidable manual S 26 0.1808 114 -0.04 81
IV.GAVE.EHZ. 2020-07-04T06:04:42.44 0.6 undecidable manual P 81 0.3211 50 -0.52 47
IV.CESX.HHZ. 2020-07-04T06:04:41.36 0.3 undecidable manual S 110 0.0971 129 0.81 66
IV.MOMA.HHZ. 2020-07-04T06:04:39.74 0.1 positive manual P 26 0.1808 114 -0.39 100
IV.CESX.HHZ. 2020-07-04T06:04:38.28 0.3 positive manual P 110 0.0971 129 -0.24 79
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHE. ML:1.4 0.0003125 0.2 AML other m 2020-07-04T06:04:41.48
IV.CESX.HHN. ML:1.3 0.0002635 0.32 AML other m 2020-07-04T06:04:41.64
IV.MOMA.HHE. ML:1.3 0.0001375 0.2 AML other m 2020-07-04T06:04:45.20
IV.MOMA.HHN. ML:1.1 9.33E-5 0.98 AML other m 2020-07-04T06:04:45.38
IV.GAVE.EHE. ML:1.4 9.305E-5 1.82 AML other m 2020-07-04T06:04:49.08
IV.GAVE.EHN. ML:1.2 6.42E-5 0.54 AML other m 2020-07-04T06:04:51.68
IV.VENT.EHE. ML:3.6 0.001052 1.2 AML other m 2020-07-04T06:05:08.79
IV.VENT.EHN. ML:3.7 0.00124 1.22 AML other m 2020-07-04T06:05:08.97
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