Earthquake with magnitude of ML 1.5 on date 21-12-2019 and time 17:20:54 (Italy) in region 8 km SE Castelsantangelo sul Nera (MC)

A magnitude ML 1.5 earthquake occured in region: 8 km SE Castelsantangelo sul Nera (MC), on

  • 21-12-2019 16:20:54 (UTC)
  • 21-12-2019 17:20:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.83, 13.2 at 14 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 8 281 281
Norcia PG 10 4957 5238
Arquata del Tronto AP 10 1178 6416
Montegallo AP 11 523 6939
Montemonaco AP 13 604 7543
Ussita MC 13 444 7987
Preci PG 14 724 8711
Visso MC 14 1107 9818
Accumoli RI 16 667 10485
Montefortino FM 17 1178 11663
Bolognola MC 18 142 11805
Acquasanta Terme AP 19 2916 14721
Cascia PG 20 3217 17938

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Foligno (57155 inhabitants)
46 Km W of Teramo (54892 inhabitants)
54 Km NE of Terni (111501 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
73 Km E of Perugia (166134 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
91 Km S of Ancona (100861 inhabitants)
93 Km W of Pescara (121014 inhabitants)
96 Km NW of Chieti (51815 inhabitants)
100 Km NE of Guidonia Montecelio (88673 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
Rev 100 ML 1.5 2019-12-21
16:20:54
42.83 13.2 14 2019-12-21
16:29:25
Sala Sismica INGV-Roma 74859561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-21 16:20:54 ± 0.15
Latitude 42.83 ± 0.01
Longitude 13.20 ± 0.01
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 74859561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 801
Semi-minor axis of confidence ellipse (meter) 364
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 157
Circular confidence region, given by single value of horizontal uncertainty (meter) 800
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 215
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 12
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
Epicentral distance of station farthest from the epicenter (degree) 0.27609
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 74859561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-21 16:29:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CAR1.HNZ. 2019-12-21T16:22:20.52 3.0 undecidable manual Sg 7.3 0
IV.MCEL.HHZ. 2019-12-21T16:21:49.28 3.0 undecidable manual Sn 0.84 0
IV.CAR1.HNZ. 2019-12-21T16:21:45.30 3.0 undecidable manual Pg 13.02 0
IV.CDRU.HHZ. 2019-12-21T16:21:42.44 3.0 undecidable manual Sn 3.38 0
IV.MCRV.HHZ. 2019-12-21T16:21:31.29 3.0 undecidable manual Sn -0.9 0
IV.CAFE.HHZ. 2019-12-21T16:21:29.47 3.0 undecidable manual Sn 0.11 0
IV.BULG.HHZ. 2019-12-21T16:21:24.26 3.0 undecidable manual Pg 6.34 0
IV.MCEL.HHZ. 2019-12-21T16:21:22.11 3.0 undecidable manual Pn 3.75 0
IV.APRC.HHZ. 2019-12-21T16:21:12.23 3.0 undecidable manual P 5.47 0
IV.CESI.HHZ. 2019-12-21T16:21:05.34 0.3 undecidable manual S 309 0.2761 98 0.16 69
IV.CSP1.EHZ. 2019-12-21T16:21:04.71 0.6 undecidable manual S 1 0.2581 99 0.04 48
IV.FDMO.HHZ. 2019-12-21T16:21:03.25 0.3 undecidable manual S 338 0.2194 101 -0.27 70
IV.CSP1.EHZ. 2019-12-21T16:21:00.36 0.1 undecidable manual P 1 0.2581 99 -0.02 96
IV.CESI.HHZ. 2019-12-21T16:21:00.70 0.3 undecidable manual P 309 0.2761 98 0.03 72
IV.MMO1.EHZ. 2019-12-21T16:21:00.52 0.3 undecidable manual S 55 0.1142 124 -0.1 73
IV.FDMO.HHZ. 2019-12-21T16:20:59.61 0.3 negative manual P 338 0.2194 101 -0.1 72
IV.NRCA.HNZ. 2019-12-21T16:20:59.30 0.3 undecidable manual S 270 0.063 146 -0.24 72
IV.PTRJ.HNZ. 2019-12-21T16:20:59.00 3.0 undecidable manual P 0 0
IV.MC2.EHZ. 2019-12-21T16:20:59.96 0.3 undecidable manual S 354 0.0782 138 0.13 73
IV.MMO1.EHZ. 2019-12-21T16:20:58.13 0.3 positive manual P 55 0.1142 124 0.09 74
IV.MC2.EHZ. 2019-12-21T16:20:57.81 0.6 positive manual P 354 0.0782 138 0.23 48
IV.NRCA.HNZ. 2019-12-21T16:20:57.47 0.1 undecidable manual P 270 0.063 146 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.7 0.0005811088 0.0768 AML other m 2019-12-21T16:20:59.68
IV.NRCA.HHN. ML:1.8 0.00077006425 0.0896 AML other m 2019-12-21T16:21:00.08
IV.NRCA.HNE. ML:1.6 0.00053003745 0.1024 AML other m 2019-12-21T16:20:59.91
IV.NRCA.HNN. ML:1.8 0.0007308451 0.0896 AML other m 2019-12-21T16:21:00.08
IV.FDMO.HHE. ML:1 5.9844765E-5 1.408 AML other m 2019-12-21T16:20:58.97
IV.FDMO.HHN. ML:1.1 7.7178315E-5 2.24 AML other m 2019-12-21T16:21:03.03
IV.CSP1.EHE. ML:1.6 0.0002024147 1.344 AML other m 2019-12-21T16:21:05.65
IV.CSP1.EHN. ML:1.3 0.000102141075 1.1008 AML other m 2019-12-21T16:21:05.28
IV.CESI.HHE. ML:1.2 7.8039055E-5 1.7408 AML other m 2019-12-21T16:21:25.22
IV.CESI.HHN. ML:1.2 6.8839035E-5 0.128 AML other m 2019-12-21T16:21:05.52
IV.CESI.HNE. ML:1.5 0.00014154392 1.2288 AML other m 2019-12-21T16:21:15.44
IV.CESI.HNN. ML:2.3 0.0008869566 0.7808 AML other m 2019-12-21T16:21:01.15
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