ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 1.0 on date 23-03-2019 and time 22:26:37 (Italy) in region 6 km SE Castelsantangelo sul Nera (MC)

A magnitude ML 1.0 earthquake occured in region: 6 km SE Castelsantangelo sul Nera (MC), on

  • 23-03-2019 21:26:37 (UTC)
  • 23-03-2019 22:26:37 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.86, 13.2 at 10 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 11 523 804
Norcia PG 11 4957 5761
Ussita MC 11 444 6205
Montemonaco AP 11 604 6809
Arquata del Tronto AP 12 1178 7987
Visso MC 13 1107 9094
Preci PG 14 724 9818
Montefortino FM 15 1178 10996
Bolognola MC 16 142 11138
Accumoli RI 18 667 11805
Amandola FM 19 3629 15434
Acquasanta Terme AP 19 2916 18350
Acquacanina MC 20 121 18471

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km E of Foligno (57155 inhabitants)
46 Km W of Teramo (54892 inhabitants)
56 Km NE of Terni (111501 inhabitants)
58 Km N of L'Aquila (69753 inhabitants)
72 Km E of Perugia (166134 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
89 Km SW of Ancona (100861 inhabitants)
93 Km W of Pescara (121014 inhabitants)
97 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
Rev 100 ML 1.0 2019-03-23
21:26:37
42.86 13.2 11 2019-03-23
21:32:39
Sala Sismica INGV-Roma 66847481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-23 21:26:37 ± 0.09
Latitude 42.86 ± 0.01
Longitude 13.20 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 66847481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 700
Semi-minor axis of confidence ellipse (meter) 435
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 184
Circular confidence region, given by single value of horizontal uncertainty (meter) 700
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.05756
Epicentral distance of station farthest from the epicenter (degree) 0.2644
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 66847481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-23 21:32:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESI.HHZ. 2019-03-23T21:26:48.08 0.1 undecidable manual S 305 0.2644 50 0.07 99
IV.CSP1.EHZ. 2019-03-23T21:26:47.00 0.6 undecidable manual S 0 0.2365 50 -0.18 49
IV.MF5.EHZ. 2019-03-23T21:26:47.60 0.3 undecidable manual S 55 0.2302 50 0.62 65
IV.FDMO.HHZ. 2019-03-23T21:26:45.68 0.3 undecidable manual S 335 0.2005 50 -0.42 70
IV.MTRA.EHZ. 2019-03-23T21:26:44.92 0.3 undecidable manual S 125 0.1727 119 -0.25 73
IV.CESI.HHZ. 2019-03-23T21:26:43.59 0.1 negative manual P 305 0.2644 50 -0.01 100
IV.CSP1.EHZ. 2019-03-23T21:26:43.02 0.6 negative manual P 0 0.2365 50 -0.1 49
IV.MF5.EHZ. 2019-03-23T21:26:43.22 1.0 positive manual P 55 0.2302 50 0.2 24
IV.NRCA.HHZ. 2019-03-23T21:26:42.12 0.3 undecidable manual S 252 0.0683 144 0.03 78
IV.FDMO.HHZ. 2019-03-23T21:26:42.26 1.0 positive manual P 335 0.2005 50 -0.24 24
IV.MMO1.EHZ. 2019-03-23T21:26:42.71 0.3 undecidable manual S 64 0.1007 133 -0.21 74
IV.MC2.EHZ. 2019-03-23T21:26:42.03 0.3 undecidable manual S 350 0.0576 149 0.18 75
IV.MTRA.EHZ. 2019-03-23T21:26:41.83 0.6 undecidable manual P 125 0.1727 119 -0.14 50
IV.NRCA.HHZ. 2019-03-23T21:26:40.40 0.1 positive manual P 252 0.0683 144 0.22 100
IV.MMO1.EHZ. 2019-03-23T21:26:40.73 0.3 undecidable manual P 64 0.1007 133 0.06 77
IV.MC2.EHZ. 2019-03-23T21:26:39.93 1.0 undecidable manual P 350 0.0576 149 -0.12 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.6 0.0006275 0.18 AML other m 2019-03-23T21:26:42.27
IV.NRCA.HHN. ML:1.8 0.0008495 0.14 AML other m 2019-03-23T21:26:42.29
IV.MTRA.EHE. ML:0.9 6.63E-5 1 AML other m 2019-03-23T21:26:45.37
IV.MTRA.EHN. ML:0.9 5.53E-5 0.36 AML other m 2019-03-23T21:26:45.57
IV.FDMO.HHE. ML:0.6 2.59E-5 0.16 AML other m 2019-03-23T21:26:45.96
IV.FDMO.HHN. ML:0.8 3.86E-5 1.74 AML other m 2019-03-23T21:26:46.97
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