Earthquake with magnitude of ML 1.1 on date 25-09-2020 and time 00:41:55 (UTC) in region 6 km SE Castelsantangelo sul Nera (MC)

A magnitude ML 1.1 earthquake occured in region: 6 km SE Castelsantangelo sul Nera (MC), on

  • 25-09-2020 00:41:55 (UTC)
  • 25-09-2020 02:41:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.86, 13.22 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
Castelsantangelo sul Nera MC 6 281 281
Montegallo AP 10 523 804
Montemonaco AP 10 604 1408
Ussita MC 11 444 1852
Arquata del Tronto AP 12 1178 3030
Visso MC 13 1107 4137
Norcia PG 13 4957 9094
Montefortino FM 13 1178 10272
Bolognola MC 15 142 10414
Preci PG 15 724 11138
Amandola FM 17 3629 14767
Acquasanta Terme AP 19 2916 17683
Acquacanina MC 19 121 17804
Comunanza AP 19 3166 20970
Accumoli RI 19 667 21637
Fiastra MC 20 559 22196
Palmiano AP 20 196 22392

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Foligno (57155 inhabitants)
46 Km NW of Teramo (54892 inhabitants)
58 Km NE of Terni (111501 inhabitants)
59 Km N of L'Aquila (69753 inhabitants)
73 Km E of Perugia (166134 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
87 Km S of Ancona (100861 inhabitants)
93 Km W of Pescara (121014 inhabitants)
96 Km NW of Chieti (51815 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 1.1 2020-09-25
00:41:55
42.87 13.22 9 2020-09-25
00:46:10
Sala Sismica INGV-Roma 83218311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-25 00:41:55 ± 0.13
Latitude 42.87 ± 0.01
Longitude 13.22 ± 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 83218311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 717
Semi-minor axis of confidence ellipse (meter) 455
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 45
Circular confidence region, given by single value of horizontal uncertainty (meter) 720
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.37142
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 83218311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-25 00:46:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TERO.HHZ. 2020-09-25T00:42:09.67 0.3 undecidable manual S 131 0.3714 50 0.06 71
IV.GUMA.HHZ. 2020-09-25T00:42:05.18 0.6 undecidable manual S 23 0.2149 110 0.79 40
IV.MTRA.EHZ. 2020-09-25T00:42:03.24 0.3 undecidable manual S 130 0.1682 115 0.5 68
IV.FDMO.HHZ. 2020-09-25T00:42:03.95 0.3 undecidable manual S 330 0.197 111 0.19 72
IV.TERO.HHZ. 2020-09-25T00:42:03.35 0.1 undecidable manual P 131 0.3714 50 -0.34 90
IV.SMA1.EHZ. 2020-09-25T00:42:01.22 0.1 undecidable manual P 160 0.2491 107 -0.19 95
IV.CSP1.EHZ. 2020-09-25T00:42:01.07 3.0 positive manual P 0.23 0
IV.FDMO.HHZ. 2020-09-25T00:42:00.16 0.3 positive manual P 330 0.197 111 -0.15 72
IV.NRCA.HHZ. 2020-09-25T00:42:00.25 0.3 undecidable manual S 248 0.0836 133 0.25 73
IV.GUMA.HHZ. 2020-09-25T00:42:00.90 0.1 undecidable manual P 23 0.2149 110 0.22 95
IV.MMO1.EHZ. 2020-09-25T00:41:59.59 0.3 undecidable manual S 66 0.0845 132 -0.44 70
IV.MTRA.EHZ. 2020-09-25T00:41:59.86 0.1 undecidable manual P 130 0.1682 115 0.13 97
IV.NRCA.HHZ. 2020-09-25T00:41:58.23 0.1 positive manual P 248 0.0836 133 0.09 100
IV.MC2.EHZ. 2020-09-25T00:41:58.78 0.3 undecidable manual S 333 0.0522 146 -0.41 70
IV.MC2.EHZ. 2020-09-25T00:41:57.51 0.1 negative manual P 333 0.0522 146 -0.16 99
IV.MMO1.EHZ. 2020-09-25T00:41:57.79 1.0 negative manual P 66 0.0845 132 -0.37 24
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:2 0.001475 0.12 AML other m 2020-09-25T00:42:00.55
IV.NRCA.HHN. ML:2 0.001645 0.12 AML other m 2020-09-25T00:42:00.55
IV.NRCA.HHE. ML:1.7 0.00076 1.4 AML other m 2020-09-25T00:42:00.25
IV.NRCA.HNE. ML:1.6 0.000681 1.9 AML other m 2020-09-25T00:42:00.00
IV.FDMO.HHE. ML:1 6.715E-5 0.26 AML other m 2020-09-25T00:42:04.41
IV.MTRA.EHN. ML:1.1 9.91E-5 1.1 AML other m 2020-09-25T00:42:04.26
IV.GUMA.HHE. ML:1.6 0.000236 0.46 AML other m 2020-09-25T00:42:05.47
IV.MTRA.EHE. ML:1.2 0.0001275 0.36 AML other m 2020-09-25T00:42:05.54
IV.GUMA.HHN. ML:1.6 0.0002775 0.56 AML other m 2020-09-25T00:42:05.66
IV.SMA1.EHN. ML:1 5.375E-5 0.58 AML other m 2020-09-25T00:42:07.00
IV.FDMO.HHN. ML:0.9 5.32E-5 0.9 AML other m 2020-09-25T00:42:07.82
IV.TERO.HHN. ML:1 3.345E-5 1.16 AML other m 2020-09-25T00:42:10.23
IV.TERO.HHE. ML:0.9 2.49E-5 0.98 AML other m 2020-09-25T00:42:11.01
IV.SMA1.EHE. ML:1.1 6.485E-5 0.66 AML other m 2020-09-25T00:42:13.60
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