Earthquake with magnitude of ML 1.0 on date 31-03-2020 and time 04:00:42 (Italy) in region 2 km S San Gemini (TR)

A magnitude ML 1.0 earthquake occured in region: 2 km S San Gemini (TR), on

  • 31-03-2020 02:00:42 (UTC)
  • 31-03-2020 04:00:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.59, 12.55 at 8 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
San Gemini TR 2 5018 5018
Montecastrilli TR 8 5022 10040
Narni TR 9 19785 29825
Terni TR 9 111501 141326
Acquasparta TR 11 4778 146104
Amelia TR 12 11897 158001
Avigliano Umbro TR 12 2558 160559
Stroncone TR 14 4917 165476
Lugnano in Teverina TR 18 1494 166970
Montefranco TR 18 1276 168246
Arrone TR 18 2763 171009
Penna in Teverina TR 19 1099 172108
Otricoli TR 20 1869 173977
Orte VT 20 8923 182900

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km W of Terni (111501 inhabitants)
41 Km E of Viterbo (67173 inhabitants)
42 Km SW of Foligno (57155 inhabitants)
59 Km S of Perugia (166134 inhabitants)
68 Km N of Guidonia Montecelio (88673 inhabitants)
73 Km N of Tivoli (56533 inhabitants)
75 Km W of L'Aquila (69753 inhabitants)
78 Km N of Roma (2864731 inhabitants)
83 Km NE of Civitavecchia (52991 inhabitants)
95 Km N of Fiumicino (78395 inhabitants)
95 Km W of Teramo (54892 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
Bulletin
Rev1000
ML 1.0 2020-03-31
02:00:42
42.59 12.55 8 2020-07-18
21:08:32
Bollettino Sismico Italiano INGV 78239111
Reviewed
Rev100
ML 1.1 2020-03-31
02:00:42
42.59 12.53 9 2020-03-31
02:13:50
Sala Sismica INGV-Roma 77719711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-31 02:00:42 ± 0.06
Latitude 42.59 ± 0.00
Longitude 12.55 ± 0.00
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 78239111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 411
Semi-minor axis of confidence ellipse (meter) 339
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 53
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 22
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
Epicentral distance of station farthest from the epicenter (degree) 0.58096
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 78239111
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-04-15 12:33:30

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 77719711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-31 02:13:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VCEL.EHZ. 2020-03-31T02:01:14.00 3.0 undecidable manual S -1.94 0
IV.SMA1.EHZ. 2020-03-31T02:01:02.91 0.6 undecidable manual S 86 0.581 50 0.51 42
IV.NRCA.HHZ. 2020-03-31T02:00:59.38 0.6 undecidable manual S 60 0.4802 50 -0.06 47
IV.MGAB.HNE. 2020-03-31T02:00:58.71 0.6 undecidable manual S 315 0.4515 50 0.13 47
IV.LNSS.HHZ. 2020-03-31T02:00:55.56 0.3 undecidable manual S 88 0.3624 50 -0.38 68
IV.SRES.HHZ. 2020-03-31T02:00:55.86 0.6 undecidable manual S 184 0.357 50 0.08 48
IV.SMA1.EHZ. 2020-03-31T02:00:53.67 0.6 undecidable manual P 86 0.581 50 -0.17 45
IV.SACS.HHE. 2020-03-31T02:00:53.12 0.6 undecidable manual P 299 0.5333 50 0.08 46
IV.BARO.HNZ. 2020-03-31T02:00:52.58 0.1 undecidable manual P 227 0.5027 50 0.07 94
IV.MGAB.HNE. 2020-03-31T02:00:51.70 0.6 undecidable manual P 315 0.4515 50 0.07 47
IV.NRCA.HHZ. 2020-03-31T02:00:51.88 0.6 undecidable manual P 60 0.4802 50 -0.25 45
IT.GNU.HGN. 2020-03-31T02:00:50.88 0.3 undecidable manual S 5 0.2113 110 0.1 74
IV.MOMA.HHZ. 2020-03-31T02:00:50.85 0.6 undecidable manual S 4 0.2113 110 0.07 50
IV.ARRO.EHZ. 2020-03-31T02:00:49.51 0.3 undecidable manual S 95 0.161 115 0.52 68
IV.SRES.HHZ. 2020-03-31T02:00:49.95 0.3 undecidable manual P 184 0.357 50 -0.06 72
IV.LNSS.HHZ. 2020-03-31T02:00:49.94 0.3 undecidable manual P 88 0.3624 50 -0.17 71
IV.MOMA.HHZ. 2020-03-31T02:00:47.10 0.1 undecidable manual P 4 0.2113 110 -0.03 100
IT.GNU.HGN. 2020-03-31T02:00:47.10 0.3 undecidable manual P 5 0.2113 110 -0.03 75
IV.ARRO.EHZ. 2020-03-31T02:00:46.35 0.6 undecidable manual P 95 0.161 115 0.25 48
IT.TRN1.HGZ. 2020-03-31T02:00:46.21 0.3 undecidable manual S 116 0.08 133 -0.18 75
IV.CESX.HHZ. 2020-03-31T02:00:45.03 0.6 undecidable manual S 62 0.0324 157 -0.28 49
IT.TRN1.HGZ. 2020-03-31T02:00:44.78 0.3 undecidable manual P 116 0.08 133 0.19 74
IV.CESX.HHZ. 2020-03-31T02:00:43.77 0.1 undecidable manual P 62 0.0324 157 -0.2 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHE. ML:1 8.945E-5 1.26 AML other m 2020-03-31T02:00:49.92
IV.ARRO.EHN. ML:1.1 0.0001128 0.22 AML other m 2020-03-31T02:00:49.70
IV.MOMA.HHE. ML:1.1 8.25E-5 1.1 AML other m 2020-03-31T02:00:51.72
IV.MOMA.HHN. ML:1.2 0.0001075 1.28 AML other m 2020-03-31T02:00:52.28
IV.CESX.HHE. ML:0 0.00041921175 0.3008 AML other m 2020-03-31T02:00:45.06
IV.CESX.HHN. ML:0 0.0005647061 0.5392 AML other m 2020-03-31T02:00:44.93
IV.SRES.HHN. ML:0.6 1.655998E-5 2.4592 AML other m 2020-03-31T02:00:56.34
IV.SRES.HHE. ML:0.8 1.823795E-5 0.16 AML other m 2020-03-31T02:00:56.85
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