Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 22-03-2020 and time 03:30:31 (UTC) in region Amatrice (RI)

A magnitude ML 1.0 earthquake occured in region: Amatrice (RI), on

  • 22-03-2020 03:30:31 (UTC)
  • 22-03-2020 04:30:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6340, 13.2870 at 11 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Amatrice RI 1 2657 2657
Accumoli RI 8 667 3324
Cittareale RI 11 482 3806
Campotosto AQ 11 542 4348
Capitignano AQ 13 665 5013
Montereale AQ 13 2581 7594
Arquata del Tronto AP 16 1178 8772
Cortino TE 18 656 9428
Acquasanta Terme AP 18 2916 12344
Borbona RI 18 617 12961
Crognaleto TE 19 1297 14258
Posta RI 20 694 14952
Cagnano Amiterno AQ 20 1369 16321

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km N of L'Aquila (69753 inhabitants)
34 Km W of Teramo (54892 inhabitants)
53 Km E of Terni (111501 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
72 Km W of Montesilvano (53738 inhabitants)
78 Km W of Pescara (121014 inhabitants)
79 Km W of Chieti (51815 inhabitants)
84 Km NE of Guidonia Montecelio (88673 inhabitants)
85 Km NE of Tivoli (56533 inhabitants)
90 Km SE of Perugia (166134 inhabitants)
100 Km E of Viterbo (67173 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
Reviewed
Rev100 		ML 1.0 2020-03-22
03:30:31		 42.6343 13.2867 11 2020-03-22
03:35:17		 Sala Sismica INGV-Roma 77449981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-22 03:30:31 ± 0.06
Latitude 42.6343 ± 0.0036
Longitude 13.2867 ± 0.0049
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 77449981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 492
Semi-minor axis of confidence ellipse (meter) 368
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 136
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
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) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00360
Epicentral distance of station farthest from the epicenter (degree) 0.26620
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:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 77449981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-22 03:35:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2020-03-22T03:30:42.56 0.3 undecidable manual S 6 29.5482 50 0.26 70
IV.TERO.HHZ. 2020-03-22T03:30:41.08 0.3 undecidable manual S 93 25.9518 50 -0.25 70
IV.NRCA.HHZ. 2020-03-22T03:30:41.12 0.3 undecidable manual S 328 26.1516 50 -0.28 69
IV.LNSS.HNZ. 2020-03-22T03:30:39.65 0.3 undecidable manual S 260 20.3685 50 -0.2 71
IV.RM33.EHZ. 2020-03-22T03:30:38.26 0.3 undecidable manual S 203 15.0738 50 -0.18 73
IV.MMO1.EHZ. 2020-03-22T03:30:38.02 0.1 undecidable manual P 6 29.5482 50 0.09 96
IV.MTRA.EHN. 2020-03-22T03:30:38.46 0.3 undecidable manual S 33 16.2726 50 -0.29 70
IV.TERO.HHZ. 2020-03-22T03:30:37.37 0.1 undecidable manual P 93 25.9518 50 0 98
IV.NRCA.HHZ. 2020-03-22T03:30:37.51 0.1 undecidable manual P 328 26.1516 50 0.11 96
IV.LNSS.HNZ. 2020-03-22T03:30:36.62 0.1 undecidable manual P 260 20.3685 50 0.11 97
IV.SMA1.EHZ. 2020-03-22T03:30:36.12 0.3 undecidable manual S 96 3.996 160 0.09 75
IV.RM33.EHZ. 2020-03-22T03:30:35.86 0.1 undecidable manual P 203 15.0738 50 0.17 97
IV.T1299.EHE. 2020-03-22T03:30:35.51 0.3 undecidable manual S 269 0.3996 178 -0.28 73
IV.MTRA.EHN. 2020-03-22T03:30:35.94 0.1 undecidable manual P 33 16.2726 50 0.06 99
IV.SMA1.EHZ. 2020-03-22T03:30:34.52 0.1 undecidable manual P 96 3.996 160 0.21 97
IV.T1299.EHE. 2020-03-22T03:30:34.28 0.1 undecidable manual P 269 0.3996 178 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.0 0.00014050000000000003 0.36 AML other m 2020-03-22T03:30:36.28
IV.SMA1.EHE. ML:1.2 0.000234 0.36 AML other m 2020-03-22T03:30:36.50
IV.TERO.HHE. ML:0.7 0.0000276 1.08 AML other m 2020-03-22T03:30:41.34
IV.NRCA.HHN. ML:1.0 0.00005065 0.34 AML other m 2020-03-22T03:30:41.65
IV.NRCA.HHE. ML:1.2 0.0000813 1.32 AML other m 2020-03-22T03:30:41.66
IV.TERO.HHN. ML:1.2 0.0000813 0.98 AML other m 2020-03-22T03:30:45.26
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